1131320 has 16 divisors (see below), whose sum is σ = 2545560. Its totient is φ = 452512.

The previous prime is 1131307. The next prime is 1131323. The reversal of 1131320 is 231311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131323) 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, 14102 + ... + 14181.

2^1131320 is an apocalyptic number.

1131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131320 is an abundant number, since it is smaller than the sum of its proper divisors (1414240).

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

1131320 is a wasteful number, since it uses less digits than its factorization.

1131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28294 (or 28290 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1131320 is about 1063.6352758347. The cubic root of 1131320 is about 104.1985850631.

Adding to 1131320 its reverse (231311), we get a palindrome (1362631).

Subtracting from 1131320 its reverse (231311), we obtain a palindrome (900009).

The spelling of 1131320 in words is "one million, one hundred thirty-one thousand, three hundred twenty".