1272713144 has 16 divisors (see below), whose sum is σ = 2444541120. Its totient is φ = 620835520.

The previous prime is 1272713129. The next prime is 1272713203. The reversal of 1272713144 is 4413172721.

It is a self number, because there is not a number n which added to its sum of digits gives 1272713144.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 1939784 + ... + 1940439.

It is an arithmetic number, because the mean of its divisors is an integer number (152783820).

Almost surely, 2^1272713144 is an apocalyptic number.

It is an amenable number.

1272713144 is a deficient number, since it is larger than the sum of its proper divisors (1171827976).

1272713144 is a wasteful number, since it uses less digits than its factorization.

1272713144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880270 (or 3880266 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 1272713144 is about 35675.1053817645. The cubic root of 1272713144 is about 1083.7027525191.

Adding to 1272713144 its reverse (4413172721), we get a palindrome (5685885865).

The spelling of 1272713144 in words is "one billion, two hundred seventy-two million, seven hundred thirteen thousand, one hundred forty-four".