1131345 has 24 divisors (see below), whose sum is σ = 2026752. Its totient is φ = 583200.

The previous prime is 1131343. The next prime is 1131353. The reversal of 1131345 is 5431311.

It is not a de Polignac number, because 1131345 - 2¹ = 1131343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 990 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (84448).

2^1131345 is an apocalyptic number.

1131345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131345 is a deficient number, since it is larger than the sum of its proper divisors (895407).

1131345 is a wasteful number, since it uses less digits than its factorization.

1131345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 853 (or 850 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 1131345 is about 1063.6470279186. The cubic root of 1131345 is about 104.1993525870.

Adding to 1131345 its reverse (5431311), we get a palindrome (6562656).

The spelling of 1131345 in words is "one million, one hundred thirty-one thousand, three hundred forty-five".