72452017 has 6 divisors (see below), whose sum is σ = 79637474. Its totient is φ = 65865360.

The previous prime is 72451993. The next prime is 72452057. The reversal of 72452017 is 71025427.

It can be written as a sum of positive squares in only one way, i.e., 50183056 + 22268961 = 7084^2 + 4719^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72452017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72452057) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 299268 + ... + 299509.

Almost surely, 2^72452017 is an apocalyptic number.

It is an amenable number.

72452017 is a deficient number, since it is larger than the sum of its proper divisors (7185457).

72452017 is a wasteful number, since it uses less digits than its factorization.

72452017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598799 (or 598788 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 72452017 is about 8511.8750578236. The cubic root of 72452017 is about 416.8855354292.

The spelling of 72452017 in words is "seventy-two million, four hundred fifty-two thousand, seventeen".