87742725 has 48 divisors (see below), whose sum is σ = 170310528. Its totient is φ = 39018240.

The previous prime is 87742691. The next prime is 87742751. The reversal of 87742725 is 52724778.

It is not a de Polignac number, because 87742725 - 2⁸ = 87742469 is a prime.

It is a super-3 number, since 3×87742725³ (a number of 25 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 17167 + ... + 21683.

It is an arithmetic number, because the mean of its divisors is an integer number (3548136).

Almost surely, 2^87742725 is an apocalyptic number.

It is an amenable number.

87742725 is a deficient number, since it is larger than the sum of its proper divisors (82567803).

87742725 is a wasteful number, since it uses less digits than its factorization.

87742725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4574 (or 4569 counting only the distinct ones).

The product of its digits is 219520, while the sum is 42.

The square root of 87742725 is about 9367.1086787760. The cubic root of 87742725 is about 444.3621294893.

The spelling of 87742725 in words is "eighty-seven million, seven hundred forty-two thousand, seven hundred twenty-five".