1338431 has 4 divisors (see below), whose sum is σ = 1348200. Its totient is φ = 1328664.

The previous prime is 1338413. The next prime is 1338433. The reversal of 1338431 is 1348331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1338431 - 2⁶ = 1338367 is a prime.

It is a super-2 number, since 2×1338431² = 3582795083522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1338397 and 1338406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338433) 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, 4676 + ... + 4953.

It is an arithmetic number, because the mean of its divisors is an integer number (337050).

2^1338431 is an apocalyptic number.

1338431 is a deficient number, since it is larger than the sum of its proper divisors (9769).

1338431 is an equidigital number, since it uses as much as digits as its factorization.

1338431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9768.

The product of its digits is 864, while the sum is 23.

The square root of 1338431 is about 1156.9057870026. The cubic root of 1338431 is about 110.2043309530.

The spelling of 1338431 in words is "one million, three hundred thirty-eight thousand, four hundred thirty-one".