870015 has 16 divisors (see below), whose sum is σ = 1437696. Its totient is φ = 448800.

The previous prime is 870013. The next prime is 870031. The reversal of 870015 is 510078.

It is a happy number.

It is not a de Polignac number, because 870015 - 2¹ = 870013 is a prime.

It is a super-2 number, since 2×870015² = 1513852200450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 869973 and 870000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471 + ... + 1400.

It is an arithmetic number, because the mean of its divisors is an integer number (89856).

2⁸⁷⁰⁰¹⁵ is an apocalyptic number.

870015 is a deficient number, since it is larger than the sum of its proper divisors (567681).

870015 is a wasteful number, since it uses less digits than its factorization.

870015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910.

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 870015 is about 932.7459461182. The cubic root of 870015 is about 95.4645757343.

The spelling of 870015 in words is "eight hundred seventy thousand, fifteen".