1311760 has 40 divisors (see below), whose sum is σ = 3214080. Its totient is φ = 496512.

The previous prime is 1311749. The next prime is 1311767. The reversal of 1311760 is 671131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (1311767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1089 + ... + 1951.

It is an arithmetic number, because the mean of its divisors is an integer number (80352).

2^1311760 is an apocalyptic number.

1311760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1607040).

1311760 is an abundant number, since it is smaller than the sum of its proper divisors (1902320).

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

1311760 is a wasteful number, since it uses less digits than its factorization.

1311760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895 (or 889 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 1311760 is about 1145.3209157262. The cubic root of 1311760 is about 109.4673978405.

Adding to 1311760 its reverse (671131), we get a palindrome (1982891).

It can be divided in two parts, 131 and 1760, that added together give a triangular number (1891 = T₆₁).

The spelling of 1311760 in words is "one million, three hundred eleven thousand, seven hundred sixty".