870121356 has 48 divisors (see below), whose sum is σ = 2189693184. Its totient is φ = 267333696.

The previous prime is 870121337. The next prime is 870121379. The reversal of 870121356 is 653121078.

It is a super-2 number, since 2×870121356² = 1514222348334557472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112155 + ... + 119661.

It is an arithmetic number, because the mean of its divisors is an integer number (45618608).

Almost surely, 2^870121356 is an apocalyptic number.

It is an amenable number.

870121356 is an abundant number, since it is smaller than the sum of its proper divisors (1319571828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

870121356 is a wasteful number, since it uses less digits than its factorization.

870121356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8270 (or 8268 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 870121356 is about 29497.8195126352. The cubic root of 870121356 is about 954.6846563530.

The spelling of 870121356 in words is "eight hundred seventy million, one hundred twenty-one thousand, three hundred fifty-six".