870681 has 12 divisors (see below), whose sum is σ = 1350672. Its totient is φ = 497448.

The previous prime is 870679. The next prime is 870691. The reversal of 870681 is 186078.

It is not a de Polignac number, because 870681 - 2¹ = 870679 is a prime.

It is a super-2 number, since 2×870681² = 1516170807522, which contains 22 as substring.

870681 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870681.

It is not an unprimeable number, because it can be changed into a prime (870601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2815 + ... + 3108.

It is an arithmetic number, because the mean of its divisors is an integer number (112556).

2⁸⁷⁰⁶⁸¹ is an apocalyptic number.

It is an amenable number.

870681 is a deficient number, since it is larger than the sum of its proper divisors (479991).

870681 is a wasteful number, since it uses less digits than its factorization.

870681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940 (or 5933 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 870681 is about 933.1028882176. The cubic root of 870681 is about 95.4889290274.

It can be divided in two parts, 870 and 681, that added together give a palindrome (1551).

The spelling of 870681 in words is "eight hundred seventy thousand, six hundred eighty-one".