72125226 has 12 divisors (see below), whose sum is σ = 156271362. Its totient is φ = 24041736.

The previous prime is 72125219. The next prime is 72125227. The reversal of 72125226 is 62252127.

It can be written as a sum of positive squares in only one way, i.e., 66830625 + 5294601 = 8175^2 + 2301^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72125226.

It is not an unprimeable number, because it can be changed into a prime (72125227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2003461 + ... + 2003496.

Almost surely, 2^72125226 is an apocalyptic number.

72125226 is an abundant number, since it is smaller than the sum of its proper divisors (84146136).

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

72125226 is a wasteful number, since it uses less digits than its factorization.

72125226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4006965 (or 4006962 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 72125226 is about 8492.6571813538. The cubic root of 72125226 is about 416.2578106372.

The spelling of 72125226 in words is "seventy-two million, one hundred twenty-five thousand, two hundred twenty-six".