74972511 has 12 divisors (see below), whose sum is σ = 112028280. Its totient is φ = 48258000.

The previous prime is 74972509. The next prime is 74972519. The reversal of 74972511 is 11527947.

It is a happy number.

74972511 is a `hidden beast` number, since 74 + 9 + 72 + 511 = 666.

It is not a de Polignac number, because 74972511 - 2¹ = 74972509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74972519) 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, 143365 + ... + 143886.

It is an arithmetic number, because the mean of its divisors is an integer number (9335690).

Almost surely, 2^74972511 is an apocalyptic number.

74972511 is a deficient number, since it is larger than the sum of its proper divisors (37055769).

74972511 is a wasteful number, since it uses less digits than its factorization.

74972511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287286 (or 287283 counting only the distinct ones).

The product of its digits is 17640, while the sum is 36.

The square root of 74972511 is about 8658.6668142388. Note that the first 3 decimals coincide. The cubic root of 74972511 is about 421.6648038648.

The spelling of 74972511 in words is "seventy-four million, nine hundred seventy-two thousand, five hundred eleven".