100443421 has 8 divisors (see below), whose sum is σ = 108284120. Its totient is φ = 92619072.

The previous prime is 100443407. The next prime is 100443439. The reversal of 100443421 is 124344001.

It can be written as a sum of positive squares in 4 ways, for example, as 19263321 + 81180100 = 4389^2 + 9010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100443421 - 2¹¹ = 100441373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100443451) 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, 10675 + ... + 17743.

It is an arithmetic number, because the mean of its divisors is an integer number (13535515).

Almost surely, 2^100443421 is an apocalyptic number.

It is an amenable number.

100443421 is a deficient number, since it is larger than the sum of its proper divisors (7840699).

100443421 is a wasteful number, since it uses less digits than its factorization.

100443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8175.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 100443421 is about 10022.1465265680. The cubic root of 100443421 is about 464.8439311290.

Adding to 100443421 its reverse (124344001), we get a palindrome (224787422).

The spelling of 100443421 in words is "one hundred million, four hundred forty-three thousand, four hundred twenty-one".