72550925 has 12 divisors (see below), whose sum is σ = 90199956. Its totient is φ = 57888000.

The previous prime is 72550913. The next prime is 72550927. The reversal of 72550925 is 52905527.

It can be written as a sum of positive squares in 6 ways, for example, as 5654884 + 66896041 = 2378^2 + 8179^2 .

It is not a de Polignac number, because 72550925 - 2²⁰ = 71502349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72550927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6407 + ... + 13643.

It is an arithmetic number, because the mean of its divisors is an integer number (7516663).

Almost surely, 2^72550925 is an apocalyptic number.

It is an amenable number.

72550925 is a deficient number, since it is larger than the sum of its proper divisors (17649031).

72550925 is a wasteful number, since it uses less digits than its factorization.

72550925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7648 (or 7643 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 72550925 is about 8517.6830769875. The cubic root of 72550925 is about 417.0751531800.

The spelling of 72550925 in words is "seventy-two million, five hundred fifty thousand, nine hundred twenty-five".