1273223226 has 48 divisors (see below), whose sum is σ = 2809330272. Its totient is φ = 384399840.

The previous prime is 1273223207. The next prime is 1273223257. The reversal of 1273223226 is 6223223721.

It is a super-4 number, since 4×1273223226⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1273223193 and 1273223202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202360 + ... + 208556.

It is an arithmetic number, because the mean of its divisors is an integer number (58527714).

Almost surely, 2^1273223226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273223226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1404665136).

1273223226 is an abundant number, since it is smaller than the sum of its proper divisors (1536107046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1273223226 is a wasteful number, since it uses less digits than its factorization.

1273223226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6507 (or 6496 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 1273223226 is about 35682.2536564046. The cubic root of 1273223226 is about 1083.8475097879.

Adding to 1273223226 its reverse (6223223721), we get a palindrome (7496446947).

The spelling of 1273223226 in words is "one billion, two hundred seventy-three million, two hundred twenty-three thousand, two hundred twenty-six".