Number 45 in British English words is forty-five.
Number consists of 2 digits, two-digit.

Number 45 in American English words is forty-five, in German words is fünfundvierzig, in French words is quarante-cinq, in Spanish words is cuarenta y cinco, in Italian words is quarantacinque, in Dutch words is vijfenveertig, in Danish words is fem og fyrre.
If you want to write in words the number 45, it is necessary to use 10 characters.

Number 45 in binary code can be written 101101.

Number 45 in octal code can be written 55.

Number 45 in hexadecimal code can be written 2D.

Number 45 in Roman numerals is XLV.

Unix timestamp 45 converted to human readable date and time is Thursday January 1, 1970, 3:00 AM.

Decimal IP address 45 converted to dotted-decimal format is 0.0.0.45.

The square root of 45 is 6.7082039324994.
Number 45 multiplied by 2 equals 90.
Divided by 2 equals 22.5.
The sum of all digits equals 9.
Number 45 raised to the power of 2 is 2025.
Number 45 raised to the power of 3 is 91125.

The cosine of number 45 is 0.52532198881773.
The sine of number 45 is 0.85090352453412.
The tangent of number 45 is 1.6197751905439.
The radian equivalent of number 45 is 0.78539816339745.
The equivalent of number 45 in degrees is 2578.3100780887.
The base-10 logarithm of number 45 is 1.6532125137753.

This number is odd number (an integer that is not evenly divisible by 2).
Number 45 is not a prime number.