72142587 has 12 divisors (see below), whose sum is σ = 113679384. Its totient is φ = 43722720.

The previous prime is 72142579. The next prime is 72142589. The reversal of 72142587 is 78524127.

72142587 is a `hidden beast` number, since 72 + 1 + 4 + 2 + 587 = 666.

It is not a de Polignac number, because 72142587 - 2³ = 72142579 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (72142589) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 364258 + ... + 364455.

It is an arithmetic number, because the mean of its divisors is an integer number (9473282).

Almost surely, 2^72142587 is an apocalyptic number.

72142587 is a deficient number, since it is larger than the sum of its proper divisors (41536797).

72142587 is a wasteful number, since it uses less digits than its factorization.

72142587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728730 (or 728727 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 72142587 is about 8493.6792381158. The cubic root of 72142587 is about 416.2912065908.

It can be divided in two parts, 7214 and 2587, that added together give a square (9801 = 99²).

The spelling of 72142587 in words is "seventy-two million, one hundred forty-two thousand, five hundred eighty-seven".