87105725 has 24 divisors (see below), whose sum is σ = 124128960. Its totient is φ = 59397120.

The previous prime is 87105713. The next prime is 87105727. The reversal of 87105725 is 52750178.

It is not a de Polignac number, because 87105725 - 2⁶ = 87105661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87105727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32486 + ... + 35064.

It is an arithmetic number, because the mean of its divisors is an integer number (5172040).

Almost surely, 2^87105725 is an apocalyptic number.

It is an amenable number.

87105725 is a deficient number, since it is larger than the sum of its proper divisors (37023235).

87105725 is a wasteful number, since it uses less digits than its factorization.

87105725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2789 (or 2784 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 87105725 is about 9333.0447872064. The cubic root of 87105725 is about 443.2841808937.

The spelling of 87105725 in words is "eighty-seven million, one hundred five thousand, seven hundred twenty-five".