715857121 has 8 divisors (see below), whose sum is σ = 834819200. Its totient is φ = 613591524.

The previous prime is 715857073. The next prime is 715857137. The reversal of 715857121 is 121758517.

It is a happy number.

715857121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 715857121 - 2¹⁷ = 715726049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (715857161) 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, 1043181 + ... + 1043866.

It is an arithmetic number, because the mean of its divisors is an integer number (104352400).

Almost surely, 2^715857121 is an apocalyptic number.

It is an amenable number.

715857121 is a deficient number, since it is larger than the sum of its proper divisors (118962079).

715857121 is an equidigital number, since it uses as much as digits as its factorization.

715857121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2087068 (or 2087054 counting only the distinct ones).

The product of its digits is 19600, while the sum is 37.

The square root of 715857121 is about 26755.5063678488. The cubic root of 715857121 is about 894.5585751164.

The spelling of 715857121 in words is "seven hundred fifteen million, eight hundred fifty-seven thousand, one hundred twenty-one".