1272889134 has 32 divisors (see below), whose sum is σ = 3085793280. Its totient is φ = 385723800.

The previous prime is 1272889117. The next prime is 1272889147. The reversal of 1272889134 is 4319882721.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1272889134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1070862 + ... + 1072049.

It is an arithmetic number, because the mean of its divisors is an integer number (96431040).

Almost surely, 2^1272889134 is an apocalyptic number.

1272889134 is an abundant number, since it is smaller than the sum of its proper divisors (1812904146).

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

1272889134 is a wasteful number, since it uses less digits than its factorization.

1272889134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2142933 (or 2142927 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1272889134 is about 35677.5718624460. The cubic root of 1272889134 is about 1083.7527014695.

The spelling of 1272889134 in words is "one billion, two hundred seventy-two million, eight hundred eighty-nine thousand, one hundred thirty-four".