87125515 has 16 divisors (see below), whose sum is σ = 106596000. Its totient is φ = 68349952.

The previous prime is 87125509. The next prime is 87125539. The reversal of 87125515 is 51552178.

It is a cyclic number.

It is not a de Polignac number, because 87125515 - 2¹³ = 87117323 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61131 + ... + 62539.

It is an arithmetic number, because the mean of its divisors is an integer number (6662250).

Almost surely, 2^87125515 is an apocalyptic number.

87125515 is a deficient number, since it is larger than the sum of its proper divisors (19470485).

87125515 is a wasteful number, since it uses less digits than its factorization.

87125515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1646.

The product of its digits is 14000, while the sum is 34.

The square root of 87125515 is about 9334.1049383430. The cubic root of 87125515 is about 443.3177490266.

The spelling of 87125515 in words is "eighty-seven million, one hundred twenty-five thousand, five hundred fifteen".