1321423401 has 16 divisors (see below), whose sum is σ = 1804296384. Its totient is φ = 859919424.

The previous prime is 1321423361. The next prime is 1321423429. The reversal of 1321423401 is 1043241231.

It is not a de Polignac number, because 1321423401 - 2⁷ = 1321423273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321423601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10230 + ... + 52416.

It is an arithmetic number, because the mean of its divisors is an integer number (112768524).

Almost surely, 2^1321423401 is an apocalyptic number.

It is an amenable number.

1321423401 is a deficient number, since it is larger than the sum of its proper divisors (482872983).

1321423401 is a wasteful number, since it uses less digits than its factorization.

1321423401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42440.

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

The square root of 1321423401 is about 36351.3878827205. The cubic root of 1321423401 is about 1097.3554657693.

Adding to 1321423401 its reverse (1043241231), we get a palindrome (2364664632).

The spelling of 1321423401 in words is "one billion, three hundred twenty-one million, four hundred twenty-three thousand, four hundred one".