72494871 has 16 divisors (see below), whose sum is σ = 99101568. Its totient is φ = 47124000.

The previous prime is 72494819. The next prime is 72494897. The reversal of 72494871 is 17849427.

It is a happy number.

It is not a de Polignac number, because 72494871 - 2¹³ = 72486679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72494371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18516 + ... + 22086.

It is an arithmetic number, because the mean of its divisors is an integer number (6193848).

Almost surely, 2^72494871 is an apocalyptic number.

72494871 is a deficient number, since it is larger than the sum of its proper divisors (26606697).

72494871 is a wasteful number, since it uses less digits than its factorization.

72494871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742.

The product of its digits is 112896, while the sum is 42.

The square root of 72494871 is about 8514.3919923856. The cubic root of 72494871 is about 416.9677125367.

The spelling of 72494871 in words is "seventy-two million, four hundred ninety-four thousand, eight hundred seventy-one".