1131425 has 12 divisors (see below), whose sum is σ = 1416576. Its totient is φ = 896400.

The previous prime is 1131421. The next prime is 1131437. The reversal of 1131425 is 5241311.

It is not a de Polignac number, because 1131425 - 2² = 1131421 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1131421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4040 + ... + 4310.

It is an arithmetic number, because the mean of its divisors is an integer number (118048).

2^1131425 is an apocalyptic number.

It is an amenable number.

1131425 is a deficient number, since it is larger than the sum of its proper divisors (285151).

1131425 is a wasteful number, since it uses less digits than its factorization.

1131425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448 (or 443 counting only the distinct ones).

The product of its digits is 120, while the sum is 17.

The square root of 1131425 is about 1063.6846337143. The cubic root of 1131425 is about 104.2018085875.

Adding to 1131425 its reverse (5241311), we get a palindrome (6372736).

The spelling of 1131425 in words is "one million, one hundred thirty-one thousand, four hundred twenty-five".