100423421 has 16 divisors (see below), whose sum is σ = 116941440. Its totient is φ = 84464640.

The previous prime is 100423409. The next prime is 100423423. The reversal of 100423421 is 124324001.

It is a cyclic number.

It is not a de Polignac number, because 100423421 - 2⁶ = 100423357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100423421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100423423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88385 + ... + 89513.

It is an arithmetic number, because the mean of its divisors is an integer number (7308840).

Almost surely, 2^100423421 is an apocalyptic number.

It is an amenable number.

100423421 is a deficient number, since it is larger than the sum of its proper divisors (16518019).

100423421 is a wasteful number, since it uses less digits than its factorization.

100423421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364.

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

The square root of 100423421 is about 10021.1486866526. The cubic root of 100423421 is about 464.8130762933.

Adding to 100423421 its reverse (124324001), we get a palindrome (224747422).

The spelling of 100423421 in words is "one hundred million, four hundred twenty-three thousand, four hundred twenty-one".