72257242 has 16 divisors (see below), whose sum is σ = 115644672. Its totient is φ = 33741760.

The previous prime is 72257233. The next prime is 72257279. The reversal of 72257242 is 24275227.

It is a super-2 number, since 2×72257242² = 10442218042893128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3658 + ... + 12565.

It is an arithmetic number, because the mean of its divisors is an integer number (7227792).

Almost surely, 2^72257242 is an apocalyptic number.

72257242 is a deficient number, since it is larger than the sum of its proper divisors (43387430).

72257242 is a wasteful number, since it uses less digits than its factorization.

72257242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16373.

The product of its digits is 15680, while the sum is 31.

The square root of 72257242 is about 8500.4259893255. The cubic root of 72257242 is about 416.5116247337.

The spelling of 72257242 in words is "seventy-two million, two hundred fifty-seven thousand, two hundred forty-two".