1311375 has 32 divisors (see below), whose sum is σ = 2358720. Its totient is φ = 643200.

The previous prime is 1311367. The next prime is 1311377. The reversal of 1311375 is 5731131.

It is not a de Polignac number, because 1311375 - 2³ = 1311367 is a prime.

1311375 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4741 + ... + 5009.

It is an arithmetic number, because the mean of its divisors is an integer number (73710).

2^1311375 is an apocalyptic number.

1311375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1311375 is a deficient number, since it is larger than the sum of its proper divisors (1047345).

1311375 is a wasteful number, since it uses less digits than its factorization.

1311375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 290 counting only the distinct ones).

The product of its digits is 315, while the sum is 21.

The square root of 1311375 is about 1145.1528282286. The cubic root of 1311375 is about 109.4566872756.

The spelling of 1311375 in words is "one million, three hundred eleven thousand, three hundred seventy-five".