870051 has 16 divisors (see below), whose sum is σ = 1428224. Its totient is φ = 458784.

The previous prime is 870049. The next prime is 870059. The reversal of 870051 is 150078.

It is a happy number.

870051 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 870051 - 2¹ = 870049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 870051.

It is not an unprimeable number, because it can be changed into a prime (870059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1321 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (89264).

2⁸⁷⁰⁰⁵¹ is an apocalyptic number.

870051 is a deficient number, since it is larger than the sum of its proper divisors (558173).

870051 is a wasteful number, since it uses less digits than its factorization.

870051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210.

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

The square root of 870051 is about 932.7652437779. The cubic root of 870051 is about 95.4658924462.

The spelling of 870051 in words is "eight hundred seventy thousand, fifty-one".