72761725 has 12 divisors (see below), whose sum is σ = 93336660. Its totient is φ = 56201600.

The previous prime is 72761707. The next prime is 72761779. The reversal of 72761725 is 52716727.

It can be written as a sum of positive squares in 6 ways, for example, as 8328996 + 64432729 = 2886^2 + 8027^2 .

It is not a de Polignac number, because 72761725 - 2⁷ = 72761597 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 49456 + ... + 50905.

It is an arithmetic number, because the mean of its divisors is an integer number (7778055).

Almost surely, 2^72761725 is an apocalyptic number.

It is an amenable number.

72761725 is a deficient number, since it is larger than the sum of its proper divisors (20574935).

72761725 is a wasteful number, since it uses less digits than its factorization.

72761725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100400 (or 100395 counting only the distinct ones).

The product of its digits is 41160, while the sum is 37.

The square root of 72761725 is about 8530.0483585968. The cubic root of 72761725 is about 417.4787061701.

The spelling of 72761725 in words is "seventy-two million, seven hundred sixty-one thousand, seven hundred twenty-five".