72720125 has 32 divisors (see below), whose sum is σ = 97169280. Its totient is φ = 54172800.

The previous prime is 72720121. The next prime is 72720127. The reversal of 72720125 is 52102727.

It is not a de Polignac number, because 72720125 - 2² = 72720121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72720094 and 72720103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72720121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158897 + ... + 159353.

It is an arithmetic number, because the mean of its divisors is an integer number (3036540).

Almost surely, 2^72720125 is an apocalyptic number.

It is an amenable number.

72720125 is a deficient number, since it is larger than the sum of its proper divisors (24449155).

72720125 is a wasteful number, since it uses less digits than its factorization.

72720125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 548 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 72720125 is about 8527.6095712691. The cubic root of 72720125 is about 417.3991294192.

The spelling of 72720125 in words is "seventy-two million, seven hundred twenty thousand, one hundred twenty-five".