72513594 has 12 divisors (see below), whose sum is σ = 157112826. Its totient is φ = 24171192.

The previous prime is 72513587. The next prime is 72513629. The reversal of 72513594 is 49531527.

It can be written as a sum of positive squares in only one way, i.e., 37051569 + 35462025 = 6087^2 + 5955^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2014249 + ... + 2014284.

Almost surely, 2^72513594 is an apocalyptic number.

72513594 is an abundant number, since it is smaller than the sum of its proper divisors (84599232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72513594 is a wasteful number, since it uses less digits than its factorization.

72513594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028541 (or 4028538 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 72513594 is about 8515.4914127137. The cubic root of 72513594 is about 417.0036057173.

The spelling of 72513594 in words is "seventy-two million, five hundred thirteen thousand, five hundred ninety-four".