87122130 has 64 divisors (see below), whose sum is σ = 215889408. Its totient is φ = 22487040.

The previous prime is 87122129. The next prime is 87122153. The reversal of 87122130 is 3122178.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87122130.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237207 + ... + 237573.

It is an arithmetic number, because the mean of its divisors is an integer number (3373272).

Almost surely, 2^87122130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87122130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107944704).

87122130 is an abundant number, since it is smaller than the sum of its proper divisors (128767278).

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

87122130 is a wasteful number, since it uses less digits than its factorization.

87122130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 87122130 is about 9333.9236122865. The cubic root of 87122130 is about 443.3120076927.

The spelling of 87122130 in words is "eighty-seven million, one hundred twenty-two thousand, one hundred thirty".