72975525 has 48 divisors (see below), whose sum is σ = 139407744. Its totient is φ = 32993280.

The previous prime is 72975517. The next prime is 72975559. The reversal of 72975525 is 52557927.

It is a happy number.

It is not a de Polignac number, because 72975525 - 2³ = 72975517 is a prime.

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 (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50209 + ... + 51641.

It is an arithmetic number, because the mean of its divisors is an integer number (2904328).

Almost surely, 2^72975525 is an apocalyptic number.

72975525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72975525 is a deficient number, since it is larger than the sum of its proper divisors (66432219).

72975525 is a wasteful number, since it uses less digits than its factorization.

72975525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1550 (or 1545 counting only the distinct ones).

The product of its digits is 220500, while the sum is 42.

The square root of 72975525 is about 8542.5713342061. The cubic root of 72975525 is about 417.8872069620.

The spelling of 72975525 in words is "seventy-two million, nine hundred seventy-five thousand, five hundred twenty-five".