72624122 has 4 divisors (see below), whose sum is σ = 108936186. Its totient is φ = 36312060.

The previous prime is 72624109. The next prime is 72624143. The reversal of 72624122 is 22142627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72063121 + 561001 = 8489^2 + 749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 72624091 and 72624100.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18156029 + ... + 18156032.

Almost surely, 2^72624122 is an apocalyptic number.

72624122 is a deficient number, since it is larger than the sum of its proper divisors (36312064).

72624122 is a wasteful number, since it uses less digits than its factorization.

72624122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36312063.

The product of its digits is 2688, while the sum is 26.

The square root of 72624122 is about 8521.9787608278. The cubic root of 72624122 is about 417.2153691221.

Adding to 72624122 its reverse (22142627), we get a palindrome (94766749).

The spelling of 72624122 in words is "seventy-two million, six hundred twenty-four thousand, one hundred twenty-two".