1131325 has 18 divisors (see below), whose sum is σ = 1536794. Its totient is φ = 821280.

The previous prime is 1131323. The next prime is 1131329. The reversal of 1131325 is 5231311.

It can be written as a sum of positive squares in 3 ways, for example, as 3481 + 1127844 = 59^2 + 1062^2 .

It is not a de Polignac number, because 1131325 - 2¹ = 1131323 is a prime.

It is an Ulam number.

It is a Duffinian number.

1131325 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1131299 and 1131308.

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 17 ways as a sum of consecutive naturals, for example, 19146 + ... + 19204.

2^1131325 is an apocalyptic number.

It is an amenable number.

1131325 is a deficient number, since it is larger than the sum of its proper divisors (405469).

1131325 is an equidigital number, since it uses as much as digits as its factorization.

1131325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 77 counting only the distinct ones).

The product of its digits is 90, while the sum is 16.

The square root of 1131325 is about 1063.6376262619. The cubic root of 1131325 is about 104.1987385688.

Adding to 1131325 its reverse (5231311), we get a palindrome (6362636).

The spelling of 1131325 in words is "one million, one hundred thirty-one thousand, three hundred twenty-five".