1311560 has 16 divisors (see below), whose sum is σ = 2951100. Its totient is φ = 524608.

The previous prime is 1311559. The next prime is 1311577. The reversal of 1311560 is 651131.

It can be written as a sum of positive squares in 2 ways, for example, as 1304164 + 7396 = 1142^2 + 86^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16355 + ... + 16434.

2^1311560 is an apocalyptic number.

1311560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311560 is an abundant number, since it is smaller than the sum of its proper divisors (1639540).

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

1311560 is a wasteful number, since it uses less digits than its factorization.

1311560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32800 (or 32796 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1311560 is about 1145.2336006248. The cubic root of 1311560 is about 109.4618341723.

Adding to 1311560 its reverse (651131), we get a palindrome (1962691).

The spelling of 1311560 in words is "one million, three hundred eleven thousand, five hundred sixty".