72001612 has 6 divisors (see below), whose sum is σ = 126002828. Its totient is φ = 36000804.

The previous prime is 72001591. The next prime is 72001639. The reversal of 72001612 is 21610027.

It is a self number, because there is not a number n which added to its sum of digits gives 72001612.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9000198 + ... + 9000205.

Almost surely, 2^72001612 is an apocalyptic number.

It is an amenable number.

72001612 is a deficient number, since it is larger than the sum of its proper divisors (54001216).

72001612 is a wasteful number, since it uses less digits than its factorization.

72001612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18000407 (or 18000405 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 72001612 is about 8485.3763617178. The cubic root of 72001612 is about 416.0198693049.

Adding to 72001612 its reverse (21610027), we get a palindrome (93611639).

The spelling of 72001612 in words is "seventy-two million, one thousand, six hundred twelve".