1131136225 has 12 divisors (see below), whose sum is σ = 1485115884. Its totient is φ = 851678720.

The previous prime is 1131136211. The next prime is 1131136243. The reversal of 1131136225 is 5226311311.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 89718784 + 1041417441 = 9472^2 + 32271^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1131136225 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131136225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1330324 + ... + 1331173.

It is an arithmetic number, because the mean of its divisors is an integer number (123759657).

Almost surely, 2^1131136225 is an apocalyptic number.

It is an amenable number.

1131136225 is a deficient number, since it is larger than the sum of its proper divisors (353979659).

1131136225 is a wasteful number, since it uses less digits than its factorization.

1131136225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661524 (or 2661519 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 1131136225 is about 33632.3687093252. The cubic root of 1131136225 is about 1041.9294264779.

Adding to 1131136225 its reverse (5226311311), we get a palindrome (6357447536).

The spelling of 1131136225 in words is "one billion, one hundred thirty-one million, one hundred thirty-six thousand, two hundred twenty-five".