1310381 has 2 divisors, whose sum is σ = 1310382. Its totient is φ = 1310380.

The previous prime is 1310371. The next prime is 1310383. The reversal of 1310381 is 1830131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990025 + 320356 = 995^2 + 566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1310381 is a prime.

It is a super-2 number, since 2×1310381² = 3434196730322, which contains 22 as substring.

Together with 1310383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655190 + 655191.

It is an arithmetic number, because the mean of its divisors is an integer number (655191).

2^1310381 is an apocalyptic number.

It is an amenable number.

1310381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310381 is an equidigital number, since it uses as much as digits as its factorization.

1310381 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1310381 is about 1144.7187427486. The cubic root of 1310381 is about 109.4290248479.

The spelling of 1310381 in words is "one million, three hundred ten thousand, three hundred eighty-one".