1318331 has 4 divisors (see below), whose sum is σ = 1506672. Its totient is φ = 1129992.

The previous prime is 1318313. The next prime is 1318349. The reversal of 1318331 is 1338131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1338131 = 293 ⋅4567.

It is an interprime number because it is at equal distance from previous prime (1318313) and next prime (1318349).

It is a cyclic number.

It is not a de Polignac number, because 1318331 - 2⁶ = 1318267 is a prime.

It is a super-2 number, since 2×1318331² = 3475993251122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1318301) 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, 94160 + ... + 94173.

It is an arithmetic number, because the mean of its divisors is an integer number (376668).

2^1318331 is an apocalyptic number.

1318331 is a deficient number, since it is larger than the sum of its proper divisors (188341).

1318331 is an equidigital number, since it uses as much as digits as its factorization.

1318331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188340.

The product of its digits is 216, while the sum is 20.

The square root of 1318331 is about 1148.1859605482. The cubic root of 1318331 is about 109.6498785083.

The spelling of 1318331 in words is "one million, three hundred eighteen thousand, three hundred thirty-one".