1271397753 has 12 divisors (see below), whose sum is σ = 1836954288. Its totient is φ = 847371960.

The previous prime is 1271397731. The next prime is 1271397767. The reversal of 1271397753 is 3577931721.

It is not a de Polignac number, because 1271397753 - 2¹⁰ = 1271396729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1271397699 and 1271397708.

It is not an unprimeable number, because it can be changed into a prime (1271397793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21126 + ... + 54672.

It is an arithmetic number, because the mean of its divisors is an integer number (153079524).

Almost surely, 2^1271397753 is an apocalyptic number.

It is an amenable number.

1271397753 is a deficient number, since it is larger than the sum of its proper divisors (565556535).

1271397753 is a wasteful number, since it uses less digits than its factorization.

1271397753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37764 (or 37761 counting only the distinct ones).

The product of its digits is 277830, while the sum is 45.

The square root of 1271397753 is about 35656.6649169549. The cubic root of 1271397753 is about 1083.3292763135.

The spelling of 1271397753 in words is "one billion, two hundred seventy-one million, three hundred ninety-seven thousand, seven hundred fifty-three".