1222266625 has 32 divisors (see below), whose sum is σ = 1587924000. Its totient is φ = 938156800.

The previous prime is 1222266611. The next prime is 1222266649. The reversal of 1222266625 is 5266622221.

It can be written as a sum of positive squares in 16 ways, for example, as 369100944 + 853165681 = 19212^2 + 29209^2 .

It is not a de Polignac number, because 1222266625 - 2⁵ = 1222266593 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 626151 + ... + 628099.

It is an arithmetic number, because the mean of its divisors is an integer number (49622625).

Almost surely, 2^1222266625 is an apocalyptic number.

It is an amenable number.

1222266625 is a deficient number, since it is larger than the sum of its proper divisors (365657375).

1222266625 is a wasteful number, since it uses less digits than its factorization.

1222266625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166 (or 2156 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 1222266625 is about 34960.9299790495. The cubic root of 1222266625 is about 1069.1910574267.

Adding to 1222266625 its reverse (5266622221), we get a palindrome (6488888846).

The spelling of 1222266625 in words is "one billion, two hundred twenty-two million, two hundred sixty-six thousand, six hundred twenty-five".