1272564626 has 8 divisors (see below), whose sum is σ = 1909017660. Its totient is φ = 636225408.

The previous prime is 1272564619. The next prime is 1272564637. The reversal of 1272564626 is 6264652721.

It can be written as a sum of positive squares in 2 ways, for example, as 1030731025 + 241833601 = 32105^2 + 15551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 9770 + ... + 51386.

Almost surely, 2^1272564626 is an apocalyptic number.

1272564626 is a deficient number, since it is larger than the sum of its proper divisors (636453034).

1272564626 is a wasteful number, since it uses less digits than its factorization.

1272564626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56908.

The product of its digits is 241920, while the sum is 41.

The square root of 1272564626 is about 35673.0237854881. The cubic root of 1272564626 is about 1083.6605970061.

The spelling of 1272564626 in words is "one billion, two hundred seventy-two million, five hundred sixty-four thousand, six hundred twenty-six".