1318431 has 8 divisors (see below), whose sum is σ = 1780480. Its totient is φ = 867672.

The previous prime is 1318411. The next prime is 1318441. The reversal of 1318431 is 1348131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1318431 - 2¹⁸ = 1056287 is a prime.

It is a super-2 number, since 2×1318431² = 3476520603522, 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 = 1318398 and 1318407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2545 + ... + 3018.

It is an arithmetic number, because the mean of its divisors is an integer number (222560).

2^1318431 is an apocalyptic number.

1318431 is a deficient number, since it is larger than the sum of its proper divisors (462049).

1318431 is an equidigital number, since it uses as much as digits as its factorization.

1318431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5645.

The product of its digits is 288, while the sum is 21.

The square root of 1318431 is about 1148.2295066754. The cubic root of 1318431 is about 109.6526508800.

The spelling of 1318431 in words is "one million, three hundred eighteen thousand, four hundred thirty-one".