72543525 has 24 divisors (see below), whose sum is σ = 120495264. Its totient is φ = 38510400.

The previous prime is 72543511. The next prime is 72543563. The reversal of 72543525 is 52534527.

It is not a de Polignac number, because 72543525 - 2⁷ = 72543397 is a prime.

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 14895 + ... + 19155.

It is an arithmetic number, because the mean of its divisors is an integer number (5020636).

Almost surely, 2^72543525 is an apocalyptic number.

72543525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72543525 is a deficient number, since it is larger than the sum of its proper divisors (47951739).

72543525 is a wasteful number, since it uses less digits than its factorization.

72543525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4501 (or 4496 counting only the distinct ones).

The product of its digits is 42000, while the sum is 33.

The square root of 72543525 is about 8517.2486754820. The cubic root of 72543525 is about 417.0609725150.

The spelling of 72543525 in words is "seventy-two million, five hundred forty-three thousand, five hundred twenty-five".