72748525 has 18 divisors (see below), whose sum is σ = 95836190. Its totient is φ = 54769920.

The previous prime is 72748523. The next prime is 72748541. The reversal of 72748525 is 52584727.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 9418761 + 63329764 = 3069^2 + 7958^2 .

It is not a de Polignac number, because 72748525 - 2¹ = 72748523 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72748523) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2191 + ... + 12259.

Almost surely, 2^72748525 is an apocalyptic number.

It is an amenable number.

72748525 is a deficient number, since it is larger than the sum of its proper divisors (23087665).

72748525 is a wasteful number, since it uses less digits than its factorization.

72748525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10113 (or 10091 counting only the distinct ones).

The product of its digits is 156800, while the sum is 40.

The square root of 72748525 is about 8529.2745881464. The cubic root of 72748525 is about 417.4534591409.

The spelling of 72748525 in words is "seventy-two million, seven hundred forty-eight thousand, five hundred twenty-five".