1232813 has 4 divisors (see below), whose sum is σ = 1237020. Its totient is φ = 1228608.

The previous prime is 1232809. The next prime is 1232831. The reversal of 1232813 is 3182321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 426409 + 806404 = 653^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232813 - 2² = 1232809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1628 + ... + 2261.

It is an arithmetic number, because the mean of its divisors is an integer number (309255).

2^1232813 is an apocalyptic number.

It is an amenable number.

1232813 is a deficient number, since it is larger than the sum of its proper divisors (4207).

1232813 is an equidigital number, since it uses as much as digits as its factorization.

1232813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206.

The product of its digits is 288, while the sum is 20.

The square root of 1232813 is about 1110.3211247202. The cubic root of 1232813 is about 107.2257440306.

The spelling of 1232813 in words is "one million, two hundred thirty-two thousand, eight hundred thirteen".