100450242 has 12 divisors (see below), whose sum is σ = 217642230. Its totient is φ = 33483408.

The previous prime is 100450241. The next prime is 100450243. The reversal of 100450242 is 242054001.

It is an interprime number because it is at equal distance from previous prime (100450241) and next prime (100450243).

It can be written as a sum of positive squares in only one way, i.e., 70408881 + 30041361 = 8391^2 + 5481^2 .

It is a super-2 number, since 2×100450242² = 20180502235717128, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 5580569 = 100450242 / (1 + 0 + 0 + 4 + 5 + 0 + 2 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (100450241) 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, 2790267 + ... + 2790302.

Almost surely, 2^100450242 is an apocalyptic number.

100450242 is an abundant number, since it is smaller than the sum of its proper divisors (117191988).

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

100450242 is a wasteful number, since it uses less digits than its factorization.

100450242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5580577 (or 5580574 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 100450242 is about 10022.4868171527. The cubic root of 100450242 is about 464.8544532340.

The spelling of 100450242 in words is "one hundred million, four hundred fifty thousand, two hundred forty-two".