870512 has 20 divisors (see below), whose sum is σ = 1729056. Its totient is φ = 424320.

The previous prime is 870497. The next prime is 870517. The reversal of 870512 is 215078.

It is a super-2 number, since 2×870512² = 1515582284288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870517) by changing a digit.

870512 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8 + ... + 1319.

2⁸⁷⁰⁵¹² is an apocalyptic number.

870512 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

870512 is a deficient number, since it is larger than the sum of its proper divisors (858544).

870512 is a wasteful number, since it uses less digits than its factorization.

870512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1376 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 870512 is about 933.0123257492. The cubic root of 870512 is about 95.4827504640.

Subtracting from 870512 its sum of digits (23), we obtain a square (870489 = 933²).

The spelling of 870512 in words is "eight hundred seventy thousand, five hundred twelve".