1311140 has 12 divisors (see below), whose sum is σ = 2753436. Its totient is φ = 524448.

The previous prime is 1311131. The next prime is 1311143. The reversal of 1311140 is 411131.

It can be written as a sum of positive squares in 2 ways, for example, as 708964 + 602176 = 842^2 + 776^2 .

It is not an unprimeable number, because it can be changed into a prime (1311143) 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, 32759 + ... + 32798.

It is an arithmetic number, because the mean of its divisors is an integer number (229453).

2^1311140 is an apocalyptic number.

1311140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311140 is an abundant number, since it is smaller than the sum of its proper divisors (1442296).

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

1311140 is a wasteful number, since it uses less digits than its factorization.

1311140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65566 (or 65564 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1311140 is about 1145.0502172394. The cubic root of 1311140 is about 109.4501486277.

Adding to 1311140 its reverse (411131), we get a palindrome (1722271).

Subtracting from 1311140 its reverse (411131), we obtain a palindrome (900009).

The spelling of 1311140 in words is "one million, three hundred eleven thousand, one hundred forty".