870427 has 4 divisors (see below), whose sum is σ = 885240. Its totient is φ = 855616.

The previous prime is 870413. The next prime is 870431. The reversal of 870427 is 724078.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 870427 - 2¹¹ = 868379 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 870395 and 870404.

It is not an unprimeable number, because it can be changed into a prime (870407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7318 + ... + 7435.

It is an arithmetic number, because the mean of its divisors is an integer number (221310).

2⁸⁷⁰⁴²⁷ is an apocalyptic number.

870427 is a deficient number, since it is larger than the sum of its proper divisors (14813).

870427 is a wasteful number, since it uses less digits than its factorization.

870427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14812.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 870427 is about 932.9667732562. The cubic root of 870427 is about 95.4796426003.

The spelling of 870427 in words is "eight hundred seventy thousand, four hundred twenty-seven".