72057187 has 4 divisors (see below), whose sum is σ = 72074200. Its totient is φ = 72040176.

The previous prime is 72057179. The next prime is 72057217. The reversal of 72057187 is 78175027.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 72057187 - 2³ = 72057179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72057107) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 3439 + ... + 12487.

It is an arithmetic number, because the mean of its divisors is an integer number (18018550).

Almost surely, 2^72057187 is an apocalyptic number.

72057187 is a deficient number, since it is larger than the sum of its proper divisors (17013).

72057187 is an equidigital number, since it uses as much as digits as its factorization.

72057187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17012.

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 72057187 is about 8488.6504816726. The cubic root of 72057187 is about 416.1268778270.

The spelling of 72057187 in words is "seventy-two million, fifty-seven thousand, one hundred eighty-seven".