72325257 has 4 divisors (see below), whose sum is σ = 96433680. Its totient is φ = 48216836.

The previous prime is 72325249. The next prime is 72325273. The reversal of 72325257 is 75252327.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75252327 = 3 ⋅25084109.

It is a cyclic number.

It is not a de Polignac number, because 72325257 - 2³ = 72325249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72325207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12054207 + ... + 12054212.

It is an arithmetic number, because the mean of its divisors is an integer number (24108420).

Almost surely, 2^72325257 is an apocalyptic number.

It is an amenable number.

72325257 is a deficient number, since it is larger than the sum of its proper divisors (24108423).

72325257 is a wasteful number, since it uses less digits than its factorization.

72325257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24108422.

The product of its digits is 29400, while the sum is 33.

The square root of 72325257 is about 8504.4257301713. The cubic root of 72325257 is about 416.6422697893.

The spelling of 72325257 in words is "seventy-two million, three hundred twenty-five thousand, two hundred fifty-seven".