1271316253 has 4 divisors (see below), whose sum is σ = 1346099580. Its totient is φ = 1196532928.

The previous prime is 1271316227. The next prime is 1271316257. The reversal of 1271316253 is 3526131721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 512479044 + 758837209 = 22638^2 + 27547^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1271316253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271316257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37391638 + ... + 37391671.

It is an arithmetic number, because the mean of its divisors is an integer number (336524895).

Almost surely, 2^1271316253 is an apocalyptic number.

It is an amenable number.

1271316253 is a deficient number, since it is larger than the sum of its proper divisors (74783327).

1271316253 is an equidigital number, since it uses as much as digits as its factorization.

1271316253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74783326.

The product of its digits is 7560, while the sum is 31.

The square root of 1271316253 is about 35655.5220547954. The cubic root of 1271316253 is about 1083.3061277165.

Adding to 1271316253 its reverse (3526131721), we get a palindrome (4797447974).

The spelling of 1271316253 in words is "one billion, two hundred seventy-one million, three hundred sixteen thousand, two hundred fifty-three".