1222657225 has 12 divisors (see below), whose sum is σ = 1521576844. Its totient is φ = 974589120.

The previous prime is 1222657223. The next prime is 1222657237. The reversal of 1222657225 is 5227562221.

It can be written as a sum of positive squares in 6 ways, for example, as 300259584 + 922397641 = 17328^2 + 30371^2 .

It is not a de Polignac number, because 1222657225 - 2¹ = 1222657223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222657223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81354 + ... + 95203.

Almost surely, 2^1222657225 is an apocalyptic number.

It is an amenable number.

1222657225 is a deficient number, since it is larger than the sum of its proper divisors (298919619).

1222657225 is a wasteful number, since it uses less digits than its factorization.

1222657225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176844 (or 176839 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The square root of 1222657225 is about 34966.5157686607. The cubic root of 1222657225 is about 1069.3049391662.

The spelling of 1222657225 in words is "one billion, two hundred twenty-two million, six hundred fifty-seven thousand, two hundred twenty-five".