1421233401 has 16 divisors (see below), whose sum is σ = 2171156864. Its totient is φ = 810082944.

The previous prime is 1421233393. The next prime is 1421233487. The reversal of 1421233401 is 1043321241.

It is not a de Polignac number, because 1421233401 - 2³ = 1421233393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1421233301) 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 15 ways as a sum of consecutive naturals, for example, 76900 + ... + 93573.

It is an arithmetic number, because the mean of its divisors is an integer number (135697304).

Almost surely, 2^1421233401 is an apocalyptic number.

It is an amenable number.

1421233401 is a deficient number, since it is larger than the sum of its proper divisors (749923463).

1421233401 is a wasteful number, since it uses less digits than its factorization.

1421233401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170880.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1421233401 is about 37699.2493426593. The cubic root of 1421233401 is about 1124.3162003570.

Adding to 1421233401 its reverse (1043321241), we get a palindrome (2464554642).

The spelling of 1421233401 in words is "one billion, four hundred twenty-one million, two hundred thirty-three thousand, four hundred one".