72500122 has 16 divisors (see below), whose sum is σ = 110500200. Its totient is φ = 35671552.

The previous prime is 72500111. The next prime is 72500149. The reversal of 72500122 is 22100527.

It can be written as a sum of positive squares in 4 ways, for example, as 9916201 + 62583921 = 3149^2 + 7911^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72500122.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32598 + ... + 34750.

Almost surely, 2^72500122 is an apocalyptic number.

72500122 is a deficient number, since it is larger than the sum of its proper divisors (38000078).

72500122 is a wasteful number, since it uses less digits than its factorization.

72500122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 72500122 is about 8514.7003470469. The cubic root of 72500122 is about 416.9777796609.

Adding to 72500122 its reverse (22100527), we get a palindrome (94600649).

The spelling of 72500122 in words is "seventy-two million, five hundred thousand, one hundred twenty-two".