1272584563 has 4 divisors (see below), whose sum is σ = 1272706560. Its totient is φ = 1272462568.

The previous prime is 1272584557. The next prime is 1272584581. The reversal of 1272584563 is 3654852721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1272584563 - 2⁵ = 1272584531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272584513) by changing a digit.

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, 43720 + ... + 66757.

It is an arithmetic number, because the mean of its divisors is an integer number (318176640).

Almost surely, 2^1272584563 is an apocalyptic number.

1272584563 is a deficient number, since it is larger than the sum of its proper divisors (121997).

1272584563 is a wasteful number, since it uses less digits than its factorization.

1272584563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121996.

The product of its digits is 403200, while the sum is 43.

The square root of 1272584563 is about 35673.3032252411. The cubic root of 1272584563 is about 1083.6662561368. Note that the first 3 decimals are identical.

The spelling of 1272584563 in words is "one billion, two hundred seventy-two million, five hundred eighty-four thousand, five hundred sixty-three".