1311880 has 16 divisors (see below), whose sum is σ = 2951820. Its totient is φ = 524736.

The previous prime is 1311857. The next prime is 1311899. The reversal of 1311880 is 881131.

It can be written as a sum of positive squares in 2 ways, for example, as 1205604 + 106276 = 1098^2 + 326^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16359 + ... + 16438.

2^1311880 is an apocalyptic number.

1311880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311880 is an abundant number, since it is smaller than the sum of its proper divisors (1639940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311880 is a wasteful number, since it uses less digits than its factorization.

1311880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32808 (or 32804 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 1311880 is about 1145.3733015921. The cubic root of 1311880 is about 109.4707357700.

The spelling of 1311880 in words is "one million, three hundred eleven thousand, eight hundred eighty".