87521874 has 16 divisors (see below), whose sum is σ = 190956960. Its totient is φ = 26521760.

The previous prime is 87521851. The next prime is 87521879. The reversal of 87521874 is 47812578.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87521879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662979 + ... + 663110.

It is an arithmetic number, because the mean of its divisors is an integer number (11934810).

Almost surely, 2^87521874 is an apocalyptic number.

87521874 is an abundant number, since it is smaller than the sum of its proper divisors (103435086).

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

87521874 is a wasteful number, since it uses less digits than its factorization.

87521874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326105.

The product of its digits is 125440, while the sum is 42.

The square root of 87521874 is about 9355.3126083525. The cubic root of 87521874 is about 443.9889920978.

The spelling of 87521874 in words is "eighty-seven million, five hundred twenty-one thousand, eight hundred seventy-four".