118325721 has 4 divisors (see below), whose sum is σ = 157767632. Its totient is φ = 78883812.

The previous prime is 118325693. The next prime is 118325759. The reversal of 118325721 is 127523811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 118325721 - 2²⁵ = 84771289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (118325821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19720951 + ... + 19720956.

It is an arithmetic number, because the mean of its divisors is an integer number (39441908).

Almost surely, 2^118325721 is an apocalyptic number.

It is an amenable number.

118325721 is a deficient number, since it is larger than the sum of its proper divisors (39441911).

118325721 is an equidigital number, since it uses as much as digits as its factorization.

118325721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39441910.

The product of its digits is 3360, while the sum is 30.

The square root of 118325721 is about 10877.7626835669. The cubic root of 118325721 is about 490.9377032114.

The spelling of 118325721 in words is "one hundred eighteen million, three hundred twenty-five thousand, seven hundred twenty-one".