1313231 has 4 divisors (see below), whose sum is σ = 1370352. Its totient is φ = 1256112.

The previous prime is 1313219. The next prime is 1313237. The reversal of 1313231 is 1323131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313231 is a prime.

It is a super-2 number, since 2×1313231² = 3449151318722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313237) 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, 28526 + ... + 28571.

It is an arithmetic number, because the mean of its divisors is an integer number (342588).

2^1313231 is an apocalyptic number.

1313231 is a deficient number, since it is larger than the sum of its proper divisors (57121).

1313231 is an equidigital number, since it uses as much as digits as its factorization.

1313231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57120.

The product of its digits is 54, while the sum is 14.

The square root of 1313231 is about 1145.9629138851. The cubic root of 1313231 is about 109.5083012548.

Adding to 1313231 its reverse (1323131), we get a palindrome (2636362).

It can be divided in two parts, 1313 and 231, that multiplied together give a palindrome (303303).

The spelling of 1313231 in words is "one million, three hundred thirteen thousand, two hundred thirty-one".