1131224 has 8 divisors (see below), whose sum is σ = 2121060. Its totient is φ = 565608.

The previous prime is 1131223. The next prime is 1131239. The reversal of 1131224 is 4221311.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1131199 and 1131208.

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 as a sum of consecutive naturals, namely, 70694 + ... + 70709.

2^1131224 is an apocalyptic number.

It is an amenable number.

1131224 is a deficient number, since it is larger than the sum of its proper divisors (989836).

1131224 is a wasteful number, since it uses less digits than its factorization.

1131224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141409 (or 141405 counting only the distinct ones).

The product of its digits is 48, while the sum is 14.

The square root of 1131224 is about 1063.5901466260. The cubic root of 1131224 is about 104.1956376662.

Adding to 1131224 its reverse (4221311), we get a palindrome (5352535).

The spelling of 1131224 in words is "one million, one hundred thirty-one thousand, two hundred twenty-four".