100123442 has 16 divisors (see below), whose sum is σ = 155492352. Its totient is φ = 48322080.

The previous prime is 100123433. The next prime is 100123447. The reversal of 100123442 is 244321001.

It is a self number, because there is not a number n which added to its sum of digits gives 100123442.

It is not an unprimeable number, because it can be changed into a prime (100123447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434 + ... + 14157.

It is an arithmetic number, because the mean of its divisors is an integer number (9718272).

Almost surely, 2^100123442 is an apocalyptic number.

100123442 is a deficient number, since it is larger than the sum of its proper divisors (55368910).

100123442 is a wasteful number, since it uses less digits than its factorization.

100123442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14713.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 100123442 is about 10006.1701964338. The cubic root of 100123442 is about 464.3497938312.

Adding to 100123442 its reverse (244321001), we get a palindrome (344444443).

The spelling of 100123442 in words is "one hundred million, one hundred twenty-three thousand, four hundred forty-two".