72426761 has 4 divisors (see below), whose sum is σ = 79011024. Its totient is φ = 65842500.

The previous prime is 72426733. The next prime is 72426773. The reversal of 72426761 is 16762427.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72426761 is a prime.

It is a super-2 number, since 2×72426761² = 10491271417902242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72426721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3292115 + ... + 3292136.

It is an arithmetic number, because the mean of its divisors is an integer number (19752756).

Almost surely, 2^72426761 is an apocalyptic number.

It is an amenable number.

72426761 is a deficient number, since it is larger than the sum of its proper divisors (6584263).

72426761 is a wasteful number, since it uses less digits than its factorization.

72426761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584262.

The product of its digits is 28224, while the sum is 35.

The square root of 72426761 is about 8510.3913541035. The cubic root of 72426761 is about 416.8370891831.

The spelling of 72426761 in words is "seventy-two million, four hundred twenty-six thousand, seven hundred sixty-one".