87130525 has 24 divisors (see below), whose sum is σ = 114903360. Its totient is φ = 65314560.

The previous prime is 87130507. The next prime is 87130531. The reversal of 87130525 is 52503178.

It is not a de Polignac number, because 87130525 - 2⁷ = 87130397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186342 + ... + 186808.

It is an arithmetic number, because the mean of its divisors is an integer number (4787640).

Almost surely, 2^87130525 is an apocalyptic number.

87130525 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

87130525 is a deficient number, since it is larger than the sum of its proper divisors (27772835).

87130525 is a wasteful number, since it uses less digits than its factorization.

87130525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933 (or 928 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 87130525 is about 9334.3733051555. The cubic root of 87130525 is about 443.3262462671.

The spelling of 87130525 in words is "eighty-seven million, one hundred thirty thousand, five hundred twenty-five".