87465021 has 16 divisors (see below), whose sum is σ = 139075584. Its totient is φ = 47806704.

The previous prime is 87464989. The next prime is 87465029. The reversal of 87465021 is 12056478.

It is not a de Polignac number, because 87465021 - 2⁵ = 87464989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87465029) 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, 90061 + ... + 91026.

It is an arithmetic number, because the mean of its divisors is an integer number (8692224).

Almost surely, 2^87465021 is an apocalyptic number.

It is an amenable number.

87465021 is a deficient number, since it is larger than the sum of its proper divisors (51610563).

87465021 is a wasteful number, since it uses less digits than its factorization.

87465021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181120.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 87465021 is about 9352.2735738429. The cubic root of 87465021 is about 443.8928349026.

The spelling of 87465021 in words is "eighty-seven million, four hundred sixty-five thousand, twenty-one".