72539 has 6 divisors (see below), whose sum is σ = 77364. Its totient is φ = 68000.

The previous prime is 72533. The next prime is 72547. The reversal of 72539 is 93527.

It is not a de Polignac number, because 72539 - 2¹² = 68443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164 + ... + 414.

It is an arithmetic number, because the mean of its divisors is an integer number (12894).

2⁷²⁵³⁹ is an apocalyptic number.

72539 is a deficient number, since it is larger than the sum of its proper divisors (4825).

72539 is a wasteful number, since it uses less digits than its factorization.

72539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 268 counting only the distinct ones).

The product of its digits is 1890, while the sum is 26.

The square root of 72539 is about 269.3306518018. The cubic root of 72539 is about 41.7052300755.

The spelling of 72539 in words is "seventy-two thousand, five hundred thirty-nine".