870045 has 16 divisors (see below), whose sum is σ = 1518912. Its totient is φ = 421760.

The previous prime is 870031. The next prime is 870047. The reversal of 870045 is 540078.

It is not a de Polignac number, because 870045 - 2⁵ = 870013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 869997 and 870024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2472 + ... + 2801.

It is an arithmetic number, because the mean of its divisors is an integer number (94932).

2⁸⁷⁰⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

870045 is a deficient number, since it is larger than the sum of its proper divisors (648867).

870045 is a wasteful number, since it uses less digits than its factorization.

870045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5292.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 870045 is about 932.7620275290. The cubic root of 870045 is about 95.4656729967.

The spelling of 870045 in words is "eight hundred seventy thousand, forty-five".