100421433 has 36 divisors (see below), whose sum is σ = 171547428. Its totient is φ = 56427840.

The previous prime is 100421429. The next prime is 100421437. The reversal of 100421433 is 334124001.

It is an interprime number because it is at equal distance from previous prime (100421429) and next prime (100421437).

It can be written as a sum of positive squares in 2 ways, for example, as 23736384 + 76685049 = 4872^2 + 8757^2 .

It is not a de Polignac number, because 100421433 - 2² = 100421429 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100421437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 25035 + ... + 28767.

Almost surely, 2^100421433 is an apocalyptic number.

It is an amenable number.

100421433 is a deficient number, since it is larger than the sum of its proper divisors (71125995).

100421433 is a wasteful number, since it uses less digits than its factorization.

100421433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3814 (or 3804 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 100421433 is about 10021.0494959360. The cubic root of 100421433 is about 464.8100090988.

Adding to 100421433 its reverse (334124001), we get a palindrome (434545434).

The spelling of 100421433 in words is "one hundred million, four hundred twenty-one thousand, four hundred thirty-three".