870657 has 4 divisors (see below), whose sum is σ = 1160880. Its totient is φ = 580436.

The previous prime is 870643. The next prime is 870679. The reversal of 870657 is 756078.

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 a cyclic number.

It is not a de Polignac number, because 870657 - 2⁴ = 870641 is a prime.

It is a super-2 number, since 2×870657² = 1516087223298, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (871657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145107 + ... + 145112.

It is an arithmetic number, because the mean of its divisors is an integer number (290220).

2⁸⁷⁰⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

870657 is a deficient number, since it is larger than the sum of its proper divisors (290223).

870657 is a wasteful number, since it uses less digits than its factorization.

870657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290222.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 870657 is about 933.0900278108. The cubic root of 870657 is about 95.4880516470.

The spelling of 870657 in words is "eight hundred seventy thousand, six hundred fifty-seven".