1224525413 has 2 divisors, whose sum is σ = 1224525414. Its totient is φ = 1224525412.

The previous prime is 1224525383. The next prime is 1224525437. The reversal of 1224525413 is 3145254221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 703681729 + 520843684 = 26527^2 + 22822^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224525413 - 2⁶ = 1224525349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224525613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612262706 + 612262707.

It is an arithmetic number, because the mean of its divisors is an integer number (612262707).

Almost surely, 2^1224525413 is an apocalyptic number.

It is an amenable number.

1224525413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224525413 is an equidigital number, since it uses as much as digits as its factorization.

1224525413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9600, while the sum is 29.

The square root of 1224525413 is about 34993.2195289316. The cubic root of 1224525413 is about 1069.8492852617.

Adding to 1224525413 its reverse (3145254221), we get a palindrome (4369779634).

The spelling of 1224525413 in words is "one billion, two hundred twenty-four million, five hundred twenty-five thousand, four hundred thirteen".