1311982 has 16 divisors (see below), whose sum is σ = 2322432. Its totient is φ = 543960.

The previous prime is 1311971. The next prime is 1311991. The reversal of 1311982 is 2891131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078 + ... + 1945.

It is an arithmetic number, because the mean of its divisors is an integer number (145152).

2^1311982 is an apocalyptic number.

1311982 is a deficient number, since it is larger than the sum of its proper divisors (1010450).

1311982 is a wasteful number, since it uses less digits than its factorization.

1311982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3063.

The product of its digits is 432, while the sum is 25.

The square root of 1311982 is about 1145.4178276943. The cubic root of 1311982 is about 109.4735728501.

The spelling of 1311982 in words is "one million, three hundred eleven thousand, nine hundred eighty-two".