1272089894 has 8 divisors (see below), whose sum is σ = 1912894488. Its totient is φ = 634458400.

The previous prime is 1272089893. The next prime is 1272089899. The reversal of 1272089894 is 4989802721.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272089893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 792272 + ... + 793875.

It is an arithmetic number, because the mean of its divisors is an integer number (239111811).

Almost surely, 2^1272089894 is an apocalyptic number.

1272089894 is a deficient number, since it is larger than the sum of its proper divisors (640804594).

1272089894 is a wasteful number, since it uses less digits than its factorization.

1272089894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586550.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 1272089894 is about 35666.3692292894. The cubic root of 1272089894 is about 1083.5258265494.

The spelling of 1272089894 in words is "one billion, two hundred seventy-two million, eighty-nine thousand, eight hundred ninety-four".