72185542 has 32 divisors (see below), whose sum is σ = 127733760. Its totient is φ = 30162720.

The previous prime is 72185537. The next prime is 72185551. The reversal of 72185542 is 24558127.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 72185498 and 72185507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109209 + ... + 109867.

It is an arithmetic number, because the mean of its divisors is an integer number (3991680).

Almost surely, 2^72185542 is an apocalyptic number.

72185542 is a deficient number, since it is larger than the sum of its proper divisors (55548218).

72185542 is a wasteful number, since it uses less digits than its factorization.

72185542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068.

The product of its digits is 22400, while the sum is 34.

The square root of 72185542 is about 8496.2075068821. The cubic root of 72185542 is about 416.3738126336.

It can be divided in two parts, 72185 and 542, that added together give a palindrome (72727).

The spelling of 72185542 in words is "seventy-two million, one hundred eighty-five thousand, five hundred forty-two".