1131229 has 6 divisors (see below), whose sum is σ = 1243550. Its totient is φ = 1028280.

The previous prime is 1131223. The next prime is 1131239. The reversal of 1131229 is 9221311.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 39204 = 1045^2 + 198^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1131229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4554 + ... + 4795.

2^1131229 is an apocalyptic number.

It is an amenable number.

1131229 is a deficient number, since it is larger than the sum of its proper divisors (112321).

1131229 is an equidigital number, since it uses as much as digits as its factorization.

1131229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9371 (or 9360 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

The square root of 1131229 is about 1063.5924971529. The cubic root of 1131229 is about 104.1957911806.

The spelling of 1131229 in words is "one million, one hundred thirty-one thousand, two hundred twenty-nine".