1311340 has 24 divisors (see below), whose sum is σ = 2777040. Its totient is φ = 520128.

The previous prime is 1311311. The next prime is 1311341. The reversal of 1311340 is 431131.

It is a super-2 number, since 2×1311340² = 3439225191200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1311340.

It is not an unprimeable number, because it can be changed into a prime (1311341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3271 + ... + 3649.

It is an arithmetic number, because the mean of its divisors is an integer number (115710).

2^1311340 is an apocalyptic number.

1311340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311340 is an abundant number, since it is smaller than the sum of its proper divisors (1465700).

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

1311340 is a wasteful number, since it uses less digits than its factorization.

1311340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1311340 is about 1145.1375463236. The cubic root of 1311340 is about 109.4557134839.

Adding to 1311340 its reverse (431131), we get a palindrome (1742471).

The spelling of 1311340 in words is "one million, three hundred eleven thousand, three hundred forty".