1313881 has 2 divisors, whose sum is σ = 1313882. Its totient is φ = 1313880.

The previous prime is 1313863. The next prime is 1313891. The reversal of 1313881 is 1883131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665856 + 648025 = 816^2 + 805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313881 is a prime.

It is a super-2 number, since 2×1313881² = 3452566564322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1313891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656940 + 656941.

It is an arithmetic number, because the mean of its divisors is an integer number (656941).

2^1313881 is an apocalyptic number.

It is an amenable number.

1313881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313881 is an equidigital number, since it uses as much as digits as its factorization.

1313881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 25.

The square root of 1313881 is about 1146.2464830917. The cubic root of 1313881 is about 109.5263657728.

The spelling of 1313881 in words is "one million, three hundred thirteen thousand, eight hundred eighty-one".