79542 has 20 divisors (see below), whose sum is σ = 178596. Its totient is φ = 26460.

The previous prime is 79537. The next prime is 79549. The reversal of 79542 is 24597.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79549) by changing a digit.

79542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 84 + ... + 407.

2⁷⁹⁵⁴² is an apocalyptic number.

79542 is an abundant number, since it is smaller than the sum of its proper divisors (99054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79542 is a wasteful number, since it uses less digits than its factorization.

79542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 496 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 79542 is about 282.0319130879. The cubic root of 79542 is about 43.0063087913.

Subtracting from 79542 its reverse (24597), we obtain a palindrome (54945).

The spelling of 79542 in words is "seventy-nine thousand, five hundred forty-two".