72122413 has 6 divisors (see below), whose sum is σ = 79275182. Its totient is φ = 65565720.

The previous prime is 72122389. The next prime is 72122431. The reversal of 72122413 is 31422127.

It can be written as a sum of positive squares in only one way, i.e., 48483369 + 23639044 = 6963^2 + 4862^2 .

It is a de Polignac number, because none of the positive numbers 2^k-72122413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72123413) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 297906 + ... + 298147.

Almost surely, 2^72122413 is an apocalyptic number.

It is an amenable number.

72122413 is a deficient number, since it is larger than the sum of its proper divisors (7152769).

72122413 is a wasteful number, since it uses less digits than its factorization.

72122413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596075 (or 596064 counting only the distinct ones).

The product of its digits is 672, while the sum is 22.

The square root of 72122413 is about 8492.4915660835. The cubic root of 72122413 is about 416.2523989918.

The spelling of 72122413 in words is "seventy-two million, one hundred twenty-two thousand, four hundred thirteen".