121875870 has 32 divisors (see below), whose sum is σ = 292844448. Its totient is φ = 32462208.

The previous prime is 121875857. The next prime is 121875913. The reversal of 121875870 is 78578121.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 31692 + ... + 35328.

It is an arithmetic number, because the mean of its divisors is an integer number (9151389).

Almost surely, 2^121875870 is an apocalyptic number.

121875870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121875870 is an abundant number, since it is smaller than the sum of its proper divisors (170968578).

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

121875870 is a wasteful number, since it uses less digits than its factorization.

121875870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4764.

The product of its (nonzero) digits is 31360, while the sum is 39.

The square root of 121875870 is about 11039.7404860803. The cubic root of 121875870 is about 495.7993004127.

The spelling of 121875870 in words is "one hundred twenty-one million, eight hundred seventy-five thousand, eight hundred seventy".