1226497156 has 12 divisors (see below), whose sum is σ = 2149993692. Its totient is φ = 612213248.

The previous prime is 1226497091. The next prime is 1226497159. The reversal of 1226497156 is 6517946221.

It can be written as a sum of positive squares in 2 ways, for example, as 556205056 + 670292100 = 23584^2 + 25890^2 .

It is not an unprimeable number, because it can be changed into a prime (1226497159) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 256165 + ... + 260908.

It is an arithmetic number, because the mean of its divisors is an integer number (179166141).

Almost surely, 2^1226497156 is an apocalyptic number.

It is an amenable number.

1226497156 is a deficient number, since it is larger than the sum of its proper divisors (923496536).

1226497156 is a wasteful number, since it uses less digits than its factorization.

1226497156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517670 (or 517668 counting only the distinct ones).

The product of its digits is 181440, while the sum is 43.

The square root of 1226497156 is about 35021.3814119318. The cubic root of 1226497156 is about 1070.4232046485.

The spelling of 1226497156 in words is "one billion, two hundred twenty-six million, four hundred ninety-seven thousand, one hundred fifty-six".