72487061 has 4 divisors (see below), whose sum is σ = 72887724. Its totient is φ = 72086400.

The previous prime is 72487049. The next prime is 72487069. The reversal of 72487061 is 16078427.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16078427 = 19 ⋅846233.

It can be written as a sum of positive squares in 2 ways, for example, as 23571025 + 48916036 = 4855^2 + 6994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72487061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72487069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200060 + ... + 200421.

It is an arithmetic number, because the mean of its divisors is an integer number (18221931).

Almost surely, 2^72487061 is an apocalyptic number.

It is an amenable number.

72487061 is a deficient number, since it is larger than the sum of its proper divisors (400663).

72487061 is a wasteful number, since it uses less digits than its factorization.

72487061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400662.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 72487061 is about 8513.9333448178. The cubic root of 72487061 is about 416.9527384439.

The spelling of 72487061 in words is "seventy-two million, four hundred eighty-seven thousand, sixty-one".