1224504131 has 4 divisors (see below), whose sum is σ = 1225374600. Its totient is φ = 1223633664.

The previous prime is 1224504119. The next prime is 1224504139. The reversal of 1224504131 is 1314054221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224504131 is a prime.

It is a super-2 number, since 2×1224504131² = 2998820733672130322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1224504097 and 1224504106.

It is not an unprimeable number, because it can be changed into a prime (1224504139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 433121 + ... + 435938.

It is an arithmetic number, because the mean of its divisors is an integer number (306343650).

Almost surely, 2^1224504131 is an apocalyptic number.

1224504131 is a deficient number, since it is larger than the sum of its proper divisors (870469).

1224504131 is an equidigital number, since it uses as much as digits as its factorization.

1224504131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870468.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1224504131 is about 34992.9154401287. The cubic root of 1224504131 is about 1069.8430873056.

Adding to 1224504131 its reverse (1314054221), we get a palindrome (2538558352).

The spelling of 1224504131 in words is "one billion, two hundred twenty-four million, five hundred four thousand, one hundred thirty-one".