1311680 has 28 divisors (see below), whose sum is σ = 3124200. Its totient is φ = 524544.

The previous prime is 1311643. The next prime is 1311689. The reversal of 1311680 is 861131.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1730 + ... + 2369.

2^1311680 is an apocalyptic number.

1311680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311680 is an abundant number, since it is smaller than the sum of its proper divisors (1812520).

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

1311680 is an equidigital number, since it uses as much as digits as its factorization.

1311680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4116 (or 4106 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1311680 is about 1145.2859904845. The cubic root of 1311680 is about 109.4651724411.

It can be divided in two parts, 1311 and 680, that added together give a palindrome (1991).

The spelling of 1311680 in words is "one million, three hundred eleven thousand, six hundred eighty".