72249457 has 12 divisors (see below), whose sum is σ = 87148416. Its totient is φ = 58666680.

The previous prime is 72249433. The next prime is 72249467. The reversal of 72249457 is 75494227.

It is not a de Polignac number, because 72249457 - 2⁷ = 72249329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72249467) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11769 + ... + 16822.

It is an arithmetic number, because the mean of its divisors is an integer number (7262368).

Almost surely, 2^72249457 is an apocalyptic number.

It is an amenable number.

72249457 is a deficient number, since it is larger than the sum of its proper divisors (14898959).

72249457 is a wasteful number, since it uses less digits than its factorization.

72249457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28636 (or 28617 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 72249457 is about 8499.9680587635. The cubic root of 72249457 is about 416.4966658666.

The spelling of 72249457 in words is "seventy-two million, two hundred forty-nine thousand, four hundred fifty-seven".