1273126056 has 32 divisors (see below), whose sum is σ = 3370040640. Its totient is φ = 399411968.

The previous prime is 1273125967. The next prime is 1273126097. The reversal of 1273126056 is 6506213721.

It is a super-2 number, since 2×1273126056² = 3241699908932230272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1559796 + ... + 1560611.

It is an arithmetic number, because the mean of its divisors is an integer number (105313770).

Almost surely, 2^1273126056 is an apocalyptic number.

It is an amenable number.

1273126056 is an abundant number, since it is smaller than the sum of its proper divisors (2096914584).

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

1273126056 is a wasteful number, since it uses less digits than its factorization.

1273126056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120433 (or 3120429 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 1273126056 is about 35680.8920292080. The cubic root of 1273126056 is about 1083.8199366858.

Adding to 1273126056 its reverse (6506213721), we get a palindrome (7779339777).

The spelling of 1273126056 in words is "one billion, two hundred seventy-three million, one hundred twenty-six thousand, fifty-six".