72124074 has 32 divisors (see below), whose sum is σ = 174847680. Its totient is φ = 21855600.

The previous prime is 72124069. The next prime is 72124109. The reversal of 72124074 is 47042127.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60117 + ... + 61304.

It is an arithmetic number, because the mean of its divisors is an integer number (5463990).

Almost surely, 2^72124074 is an apocalyptic number.

72124074 is an abundant number, since it is smaller than the sum of its proper divisors (102723606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72124074 is a wasteful number, since it uses less digits than its factorization.

72124074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121443 (or 121437 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 72124074 is about 8492.5893577872. The cubic root of 72124074 is about 416.2555944382.

The spelling of 72124074 in words is "seventy-two million, one hundred twenty-four thousand, seventy-four".