118805721 has 8 divisors (see below), whose sum is σ = 163870080. Its totient is φ = 76472592.

The previous prime is 118805711. The next prime is 118805737. The reversal of 118805721 is 127508811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 118805721 - 2¹¹ = 118803673 is a prime.

It is a super-2 number, since 2×118805721² = 28229598684659682, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (118805711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 682705 + ... + 682878.

It is an arithmetic number, because the mean of its divisors is an integer number (20483760).

Almost surely, 2^118805721 is an apocalyptic number.

It is an amenable number.

118805721 is a deficient number, since it is larger than the sum of its proper divisors (45064359).

118805721 is a wasteful number, since it uses less digits than its factorization.

118805721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365615.

The product of its (nonzero) digits is 4480, while the sum is 33.

The square root of 118805721 is about 10899.8037138290. The cubic root of 118805721 is about 491.6006533734.

The spelling of 118805721 in words is "one hundred eighteen million, eight hundred five thousand, seven hundred twenty-one".