100421994 has 16 divisors (see below), whose sum is σ = 201058560. Its totient is φ = 33438240.

The previous prime is 100421969. The next prime is 100422001. The reversal of 100421994 is 499124001.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2499 + ... + 14390.

It is an arithmetic number, because the mean of its divisors is an integer number (12566160).

Almost surely, 2^100421994 is an apocalyptic number.

100421994 is an abundant number, since it is smaller than the sum of its proper divisors (100636566).

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

100421994 is a wasteful number, since it uses less digits than its factorization.

100421994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17885.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 100421994 is about 10021.0774869771. The cubic root of 100421994 is about 464.8108746442.

Adding to 100421994 its reverse (499124001), we get a palindrome (599545995).

The spelling of 100421994 in words is "one hundred million, four hundred twenty-one thousand, nine hundred ninety-four".