100242 has 12 divisors (see below), whose sum is σ = 217230. Its totient is φ = 33408.

The previous prime is 100237. The next prime is 100267. The reversal of 100242 is 242001.

It can be written as a sum of positive squares in only one way, i.e., 95481 + 4761 = 309^2 + 69^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

100242 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 5 ways as a sum of consecutive naturals, for example, 2767 + ... + 2802.

2¹⁰⁰²⁴² is an apocalyptic number.

100242 is an abundant number, since it is smaller than the sum of its proper divisors (116988).

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

100242 is a wasteful number, since it uses less digits than its factorization.

100242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5577 (or 5574 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 100242 is about 316.6101703989. The cubic root of 100242 is about 46.4533003233.

Adding to 100242 its reverse (242001), we get a palindrome (342243).

The spelling of 100242 in words is "one hundred thousand, two hundred forty-two", and thus it is an iban number.