72042553 has 12 divisors (see below), whose sum is σ = 79731904. Its totient is φ = 65043000.

The previous prime is 72042541. The next prime is 72042557. The reversal of 72042553 is 35524027.

It is not a de Polignac number, because 72042553 - 2⁵ = 72042521 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72042557) 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 11 ways as a sum of consecutive naturals, for example, 16300 + ... + 20242.

Almost surely, 2^72042553 is an apocalyptic number.

It is an amenable number.

72042553 is a deficient number, since it is larger than the sum of its proper divisors (7689351).

72042553 is a wasteful number, since it uses less digits than its factorization.

72042553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4116 (or 4105 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 28.

The square root of 72042553 is about 8487.7884634338. The cubic root of 72042553 is about 416.0987056984.

The spelling of 72042553 in words is "seventy-two million, forty-two thousand, five hundred fifty-three".