72240587 has 2 divisors, whose sum is σ = 72240588. Its totient is φ = 72240586.

The previous prime is 72240563. The next prime is 72240659. The reversal of 72240587 is 78504227.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72240587 - 2²² = 68046283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72240517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36120293 + 36120294.

It is an arithmetic number, because the mean of its divisors is an integer number (36120294).

Almost surely, 2^72240587 is an apocalyptic number.

72240587 is a deficient number, since it is larger than the sum of its proper divisors (1).

72240587 is an equidigital number, since it uses as much as digits as its factorization.

72240587 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31360, while the sum is 35.

The square root of 72240587 is about 8499.4462760818. The cubic root of 72240587 is about 416.4796208636.

It can be divided in two parts, 72240 and 587, that added together give a palindrome (72827).

The spelling of 72240587 in words is "seventy-two million, two hundred forty thousand, five hundred eighty-seven".