1313381 has 4 divisors (see below), whose sum is σ = 1358700. Its totient is φ = 1268064.

The previous prime is 1313371. The next prime is 1313383. The reversal of 1313381 is 1833131.

It is a happy number.

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 902500 + 410881 = 950^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313381 - 2⁶ = 1313317 is a prime.

It is a super-2 number, since 2×1313381² = 3449939302322, which contains 22 as substring.

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 (1313383) 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, 22616 + ... + 22673.

It is an arithmetic number, because the mean of its divisors is an integer number (339675).

2^1313381 is an apocalyptic number.

It is an amenable number.

1313381 is a deficient number, since it is larger than the sum of its proper divisors (45319).

1313381 is an equidigital number, since it uses as much as digits as its factorization.

1313381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45318.

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

The square root of 1313381 is about 1146.0283591605. The cubic root of 1313381 is about 109.5124705187.

The spelling of 1313381 in words is "one million, three hundred thirteen thousand, three hundred eighty-one".