1272729774 has 32 divisors (see below), whose sum is σ = 2631638016. Its totient is φ = 410032800.

The previous prime is 1272729767. The next prime is 1272729793. The reversal of 1272729774 is 4779272721.

1272729774 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 14539 + ... + 52505.

It is an arithmetic number, because the mean of its divisors is an integer number (82238688).

Almost surely, 2^1272729774 is an apocalyptic number.

1272729774 is an abundant number, since it is smaller than the sum of its proper divisors (1358908242).

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

1272729774 is a wasteful number, since it uses less digits than its factorization.

1272729774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38160.

The product of its digits is 691488, while the sum is 48.

The square root of 1272729774 is about 35675.3384566986. The cubic root of 1272729774 is about 1083.7074725925.

The spelling of 1272729774 in words is "one billion, two hundred seventy-two million, seven hundred twenty-nine thousand, seven hundred seventy-four".