100026421 has 4 divisors (see below), whose sum is σ = 109119744. Its totient is φ = 90933100.

The previous prime is 100026413. The next prime is 100026457. The reversal of 100026421 is 124620001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124620001 = 11 ⋅11329091.

It is a cyclic number.

It is not a de Polignac number, because 100026421 - 2³ = 100026413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100026395 and 100026404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100026401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4546645 + ... + 4546666.

It is an arithmetic number, because the mean of its divisors is an integer number (27279936).

Almost surely, 2^100026421 is an apocalyptic number.

100026421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100026421 is a deficient number, since it is larger than the sum of its proper divisors (9093323).

100026421 is an equidigital number, since it uses as much as digits as its factorization.

100026421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093322.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 100026421 is about 10001.3209627529. The cubic root of 100026421 is about 464.1997582345.

Adding to 100026421 its reverse (124620001), we get a palindrome (224646422).

The spelling of 100026421 in words is "one hundred million, twenty-six thousand, four hundred twenty-one".