1331224 has 8 divisors (see below), whose sum is σ = 2496060. Its totient is φ = 665608.

The previous prime is 1331207. The next prime is 1331227. The reversal of 1331224 is 4221331.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 1331198 and 1331207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83194 + ... + 83209.

2^1331224 is an apocalyptic number.

It is an amenable number.

1331224 is a deficient number, since it is larger than the sum of its proper divisors (1164836).

1331224 is a wasteful number, since it uses less digits than its factorization.

1331224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166409 (or 166405 counting only the distinct ones).

The product of its digits is 144, while the sum is 16.

The square root of 1331224 is about 1153.7868087303. The cubic root of 1331224 is about 110.0061704528.

Adding to 1331224 its reverse (4221331), we get a palindrome (5552555).

The spelling of 1331224 in words is "one million, three hundred thirty-one thousand, two hundred twenty-four".