72507417 has 16 divisors (see below), whose sum is σ = 101038080. Its totient is φ = 46205712.

The previous prime is 72507367. The next prime is 72507433. The reversal of 72507417 is 71470527.

It is a happy number.

It is not a de Polignac number, because 72507417 - 2⁷ = 72507289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72507497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84 + ... + 12042.

It is an arithmetic number, because the mean of its divisors is an integer number (6314880).

Almost surely, 2^72507417 is an apocalyptic number.

It is an amenable number.

72507417 is a deficient number, since it is larger than the sum of its proper divisors (28530663).

72507417 is a wasteful number, since it uses less digits than its factorization.

72507417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12052.

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 72507417 is about 8515.1287130612. The cubic root of 72507417 is about 416.9917646989.

The spelling of 72507417 in words is "seventy-two million, five hundred seven thousand, four hundred seventeen".