1224134725 has 24 divisors (see below), whose sum is σ = 1753334208. Its totient is φ = 837907200.

The previous prime is 1224134719. The next prime is 1224134729. The reversal of 1224134725 is 5274314221.

It is a happy number.

It is not a de Polignac number, because 1224134725 - 2¹⁷ = 1224003653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224134729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126249 + ... + 135598.

It is an arithmetic number, because the mean of its divisors is an integer number (73055592).

Almost surely, 2^1224134725 is an apocalyptic number.

It is an amenable number.

1224134725 is a deficient number, since it is larger than the sum of its proper divisors (529199483).

1224134725 is a wasteful number, since it uses less digits than its factorization.

1224134725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261885 (or 261880 counting only the distinct ones).

The product of its digits is 13440, while the sum is 31.

The square root of 1224134725 is about 34987.6367449989. The cubic root of 1224134725 is about 1069.7354937653.

Adding to 1224134725 its reverse (5274314221), we get a palindrome (6498448946).

The spelling of 1224134725 in words is "one billion, two hundred twenty-four million, one hundred thirty-four thousand, seven hundred twenty-five".