1272895564 has 6 divisors (see below), whose sum is σ = 2227567244. Its totient is φ = 636447780.

The previous prime is 1272895549. The next prime is 1272895573. The reversal of 1272895564 is 4655982721.

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 as a sum of consecutive naturals, namely, 159111942 + ... + 159111949.

Almost surely, 2^1272895564 is an apocalyptic number.

It is an amenable number.

1272895564 is a deficient number, since it is larger than the sum of its proper divisors (954671680).

1272895564 is a wasteful number, since it uses less digits than its factorization.

1272895564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318223895 (or 318223893 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The square root of 1272895564 is about 35677.6619749669. The cubic root of 1272895564 is about 1083.7545263255.

The spelling of 1272895564 in words is "one billion, two hundred seventy-two million, eight hundred ninety-five thousand, five hundred sixty-four".