72665142 has 32 divisors (see below), whose sum is σ = 165438720. Its totient is φ = 21061920.

The previous prime is 72665137. The next prime is 72665251. The reversal of 72665142 is 24156627.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent 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, 22417 + ... + 25452.

It is an arithmetic number, because the mean of its divisors is an integer number (5169960).

Almost surely, 2^72665142 is an apocalyptic number.

72665142 is an abundant number, since it is smaller than the sum of its proper divisors (92773578).

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

72665142 is a wasteful number, since it uses less digits than its factorization.

72665142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47908.

The product of its digits is 20160, while the sum is 33.

The square root of 72665142 is about 8524.3851391171. The cubic root of 72665142 is about 417.2939057148.

The spelling of 72665142 in words is "seventy-two million, six hundred sixty-five thousand, one hundred forty-two".