87120522 has 20 divisors (see below), whose sum is σ = 195214866. Its totient is φ = 29040120.

The previous prime is 87120497. The next prime is 87120547. The reversal of 87120522 is 22502178.

It is an interprime number because it is at equal distance from previous prime (87120497) and next prime (87120547).

It can be written as a sum of positive squares in only one way, i.e., 69906321 + 17214201 = 8361^2 + 4149^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 268729 + ... + 269052.

Almost surely, 2^87120522 is an apocalyptic number.

87120522 is an abundant number, since it is smaller than the sum of its proper divisors (108094344).

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

87120522 is a wasteful number, since it uses less digits than its factorization.

87120522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537795 (or 537786 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 87120522 is about 9333.8374744796. The cubic root of 87120522 is about 443.3092802950.

The spelling of 87120522 in words is "eighty-seven million, one hundred twenty thousand, five hundred twenty-two".