40542 has 16 divisors (see below), whose sum is σ = 84240. Its totient is φ = 12992.

The previous prime is 40531. The next prime is 40543. The reversal of 40542 is 24504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40543) by changing a digit.

40542 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 7 ways as a sum of consecutive naturals, for example, 58 + ... + 290.

It is an arithmetic number, because the mean of its divisors is an integer number (5265).

2⁴⁰⁵⁴² is an apocalyptic number.

40542 is an abundant number, since it is smaller than the sum of its proper divisors (43698).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42120).

40542 is a wasteful number, since it uses less digits than its factorization.

40542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267.

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 40542 is about 201.3504407743. The cubic root of 40542 is about 34.3532942860.

The spelling of 40542 in words is "forty thousand, five hundred forty-two".