72125687 has 2 divisors, whose sum is σ = 72125688. Its totient is φ = 72125686.

The previous prime is 72125621. The next prime is 72125693. The reversal of 72125687 is 78652127.

It is a strong prime.

It is an emirp because it is prime and its reverse (78652127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72125687 - 2²⁴ = 55348471 is a prime.

It is a super-2 number, since 2×72125687² = 10404229450443938, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72125687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72124687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36062843 + 36062844.

It is an arithmetic number, because the mean of its divisors is an integer number (36062844).

Almost surely, 2^72125687 is an apocalyptic number.

72125687 is a deficient number, since it is larger than the sum of its proper divisors (1).

72125687 is an equidigital number, since it uses as much as digits as its factorization.

72125687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 72125687 is about 8492.6843224036. The cubic root of 72125687 is about 416.2586974949.

The spelling of 72125687 in words is "seventy-two million, one hundred twenty-five thousand, six hundred eighty-seven".