1301813 has 4 divisors (see below), whose sum is σ = 1310700. Its totient is φ = 1292928.

The previous prime is 1301779. The next prime is 1301821. The reversal of 1301813 is 3181031.

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 305809 + 996004 = 553^2 + 998^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301813 - 2¹⁴ = 1285429 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301791 and 1301800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301863) 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, 4220 + ... + 4517.

It is an arithmetic number, because the mean of its divisors is an integer number (327675).

2^1301813 is an apocalyptic number.

It is an amenable number.

1301813 is a deficient number, since it is larger than the sum of its proper divisors (8887).

1301813 is an equidigital number, since it uses as much as digits as its factorization.

1301813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8886.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1301813 is about 1140.9702011884. The cubic root of 1301813 is about 109.1900005156.

Adding to 1301813 its reverse (3181031), we get a palindrome (4482844).

It can be divided in two parts, 13018 and 13, that added together give a palindrome (13031).

The spelling of 1301813 in words is "one million, three hundred one thousand, eight hundred thirteen".