72651925 has 6 divisors (see below), whose sum is σ = 90088418. Its totient is φ = 58121520.

The previous prime is 72651913. The next prime is 72651947. The reversal of 72651925 is 52915627.

It can be written as a sum of positive squares in 3 ways, for example, as 1435204 + 71216721 = 1198^2 + 8439^2 .

It is not a de Polignac number, because 72651925 - 2⁵ = 72651893 is a prime.

It is a Duffinian number.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 1453014 + ... + 1453063.

Almost surely, 2^72651925 is an apocalyptic number.

It is an amenable number.

72651925 is a deficient number, since it is larger than the sum of its proper divisors (17436493).

72651925 is a wasteful number, since it uses less digits than its factorization.

72651925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906087 (or 2906082 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 72651925 is about 8523.6098573316. The cubic root of 72651925 is about 417.2686037712.

The spelling of 72651925 in words is "seventy-two million, six hundred fifty-one thousand, nine hundred twenty-five".