72756242 has 8 divisors (see below), whose sum is σ = 117529356. Its totient is φ = 33579792.

The previous prime is 72756197. The next prime is 72756269. The reversal of 72756242 is 24265727.

It can be written as a sum of positive squares in 2 ways, for example, as 56987401 + 15768841 = 7549^2 + 3971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1399133 + ... + 1399184.

Almost surely, 2^72756242 is an apocalyptic number.

72756242 is a deficient number, since it is larger than the sum of its proper divisors (44773114).

72756242 is a wasteful number, since it uses less digits than its factorization.

72756242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2798332.

The product of its digits is 47040, while the sum is 35.

The square root of 72756242 is about 8529.7269592877. The cubic root of 72756242 is about 417.4682194605.

The spelling of 72756242 in words is "seventy-two million, seven hundred fifty-six thousand, two hundred forty-two".