1272279753 has 24 divisors (see below), whose sum is σ = 1941937920. Its totient is φ = 801028800.

The previous prime is 1272279751. The next prime is 1272279763. The reversal of 1272279753 is 3579722721.

It is not a de Polignac number, because 1272279753 - 2¹ = 1272279751 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1272279699 and 1272279708.

It is not an unprimeable number, because it can be changed into a prime (1272279751) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 22548 + ... + 55253.

It is an arithmetic number, because the mean of its divisors is an integer number (80914080).

Almost surely, 2^1272279753 is an apocalyptic number.

It is an amenable number.

1272279753 is a deficient number, since it is larger than the sum of its proper divisors (669658167).

1272279753 is a wasteful number, since it uses less digits than its factorization.

1272279753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77909 (or 77906 counting only the distinct ones).

The product of its digits is 370440, while the sum is 45.

The square root of 1272279753 is about 35669.0307269486. The cubic root of 1272279753 is about 1083.5797291594.

The spelling of 1272279753 in words is "one billion, two hundred seventy-two million, two hundred seventy-nine thousand, seven hundred fifty-three".