1316881 has 2 divisors, whose sum is σ = 1316882. Its totient is φ = 1316880.

The previous prime is 1316873. The next prime is 1316899. The reversal of 1316881 is 1886131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 266256 = 1025^2 + 516^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316881 - 2³ = 1316873 is a prime.

It is a super-2 number, since 2×1316881² = 3468351136322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1316801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658440 + 658441.

It is an arithmetic number, because the mean of its divisors is an integer number (658441).

2^1316881 is an apocalyptic number.

It is an amenable number.

1316881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1316881 is an equidigital number, since it uses as much as digits as its factorization.

1316881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 28.

The square root of 1316881 is about 1147.5543560111. The cubic root of 1316881 is about 109.6096633549.

It can be divided in two parts, 1316 and 881, that added together give a cube (2197 = 13³).

The spelling of 1316881 in words is "one million, three hundred sixteen thousand, eight hundred eighty-one".