421433401 has 4 divisors (see below), whose sum is σ = 428576400. Its totient is φ = 414290404.

The previous prime is 421433377. The next prime is 421433447. The reversal of 421433401 is 104334124.

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.

It is a cyclic number.

It is not a de Polignac number, because 421433401 - 2¹⁵ = 421400633 is a prime.

It is a super-2 number, since 2×421433401² = 355212222956853602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421433101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3571411 + ... + 3571528.

It is an arithmetic number, because the mean of its divisors is an integer number (107144100).

Almost surely, 2^421433401 is an apocalyptic number.

It is an amenable number.

421433401 is a deficient number, since it is larger than the sum of its proper divisors (7142999).

421433401 is an equidigital number, since it uses as much as digits as its factorization.

421433401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7142998.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 421433401 is about 20528.8431481172. The cubic root of 421433401 is about 749.7382203429.

Adding to 421433401 its reverse (104334124), we get a palindrome (525767525).

The spelling of 421433401 in words is "four hundred twenty-one million, four hundred thirty-three thousand, four hundred one".