72756425 has 18 divisors (see below), whose sum is σ = 104949198. Its totient is φ = 49889280.

The previous prime is 72756421. The next prime is 72756433. The reversal of 72756425 is 52465727.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 659344 + 72097081 = 812^2 + 8491^2 .

It is not a de Polignac number, because 72756425 - 2² = 72756421 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72756421) 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, 28472 + ... + 30921.

It is an arithmetic number, because the mean of its divisors is an integer number (5830511).

Almost surely, 2^72756425 is an apocalyptic number.

It is an amenable number.

72756425 is a deficient number, since it is larger than the sum of its proper divisors (32192773).

72756425 is a wasteful number, since it uses less digits than its factorization.

72756425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59417 (or 59405 counting only the distinct ones).

The product of its digits is 117600, while the sum is 38.

The square root of 72756425 is about 8529.7376864708. The cubic root of 72756425 is about 417.4685694722.

The spelling of 72756425 in words is "seventy-two million, seven hundred fifty-six thousand, four hundred twenty-five".