1401320431 has 4 divisors (see below), whose sum is σ = 1601509072. Its totient is φ = 1201131792.

The previous prime is 1401320429. The next prime is 1401320441. The reversal of 1401320431 is 1340231041.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1401320431 - 2¹ = 1401320429 is a prime.

It is a super-2 number, since 2×1401320431² = 3927397900676051522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1401320399 and 1401320408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1401320441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100094310 + ... + 100094323.

It is an arithmetic number, because the mean of its divisors is an integer number (400377268).

Almost surely, 2^1401320431 is an apocalyptic number.

1401320431 is a deficient number, since it is larger than the sum of its proper divisors (200188641).

1401320431 is an equidigital number, since it uses as much as digits as its factorization.

1401320431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200188640.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1401320431 is about 37434.2147106093. The cubic root of 1401320431 is about 1119.0405343201.

Adding to 1401320431 its reverse (1340231041), we get a palindrome (2741551472).

The spelling of 1401320431 in words is "one billion, four hundred one million, three hundred twenty thousand, four hundred thirty-one".