117052721 has 4 divisors (see below), whose sum is σ = 117475572. Its totient is φ = 116629872.

The previous prime is 117052709. The next prime is 117052723. The reversal of 117052721 is 127250711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10962721 + 106090000 = 3311^2 + 10300^2 .

It is a cyclic number.

It is not a de Polignac number, because 117052721 - 2⁶ = 117052657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117052723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211010 + ... + 211563.

It is an arithmetic number, because the mean of its divisors is an integer number (29368893).

Almost surely, 2^117052721 is an apocalyptic number.

It is an amenable number.

117052721 is a deficient number, since it is larger than the sum of its proper divisors (422851).

117052721 is an equidigital number, since it uses as much as digits as its factorization.

117052721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422850.

The product of its (nonzero) digits is 980, while the sum is 26.

The square root of 117052721 is about 10819.0905810054. The cubic root of 117052721 is about 489.1707771522.

The spelling of 117052721 in words is "one hundred seventeen million, fifty-two thousand, seven hundred twenty-one".