72562891 has 4 divisors (see below), whose sum is σ = 72670752. Its totient is φ = 72455032.

The previous prime is 72562871. The next prime is 72562921. The reversal of 72562891 is 19826527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72562891 - 2⁵ = 72562859 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72562871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52915 + ... + 54268.

It is an arithmetic number, because the mean of its divisors is an integer number (18167688).

Almost surely, 2^72562891 is an apocalyptic number.

72562891 is the 5388-th centered pentagonal number.

72562891 is a deficient number, since it is larger than the sum of its proper divisors (107861).

72562891 is a wasteful number, since it uses less digits than its factorization.

72562891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107860.

The product of its digits is 60480, while the sum is 40.

The square root of 72562891 is about 8518.3854690898. The cubic root of 72562891 is about 417.0980816583.

The spelling of 72562891 in words is "seventy-two million, five hundred sixty-two thousand, eight hundred ninety-one".