87512465 has 4 divisors (see below), whose sum is σ = 105014964. Its totient is φ = 70009968.

The previous prime is 87512441. The next prime is 87512483. The reversal of 87512465 is 56421578.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33166081 + 54346384 = 5759^2 + 7372^2 .

It is a cyclic number.

It is not a de Polignac number, because 87512465 - 2¹⁰ = 87511441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8751242 + ... + 8751251.

It is an arithmetic number, because the mean of its divisors is an integer number (26253741).

Almost surely, 2^87512465 is an apocalyptic number.

It is an amenable number.

87512465 is a deficient number, since it is larger than the sum of its proper divisors (17502499).

87512465 is a wasteful number, since it uses less digits than its factorization.

87512465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17502498.

The product of its digits is 67200, while the sum is 38.

The square root of 87512465 is about 9354.8097254835. The cubic root of 87512465 is about 443.9730812482.

The spelling of 87512465 in words is "eighty-seven million, five hundred twelve thousand, four hundred sixty-five".