100542 has 16 divisors (see below), whose sum is σ = 216720. Its totient is φ = 30912.

The previous prime is 100537. The next prime is 100547. The reversal of 100542 is 245001.

It is an interprime number because it is at equal distance from previous prime (100537) and next prime (100547).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100547) by changing a digit.

100542 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, 567 + ... + 722.

It is an arithmetic number, because the mean of its divisors is an integer number (13545).

2¹⁰⁰⁵⁴² is an apocalyptic number.

100542 is an abundant number, since it is smaller than the sum of its proper divisors (116178).

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

100542 is a wasteful number, since it uses less digits than its factorization.

100542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 100542 is about 317.0835851948. The cubic root of 100542 is about 46.4995953254.

Adding to 100542 its reverse (245001), we get a palindrome (345543).

The spelling of 100542 in words is "one hundred thousand, five hundred forty-two".