1256352271 has 2 divisors, whose sum is σ = 1256352272. Its totient is φ = 1256352270.

The previous prime is 1256352269. The next prime is 1256352277. The reversal of 1256352271 is 1722536521.

It is a weak prime.

It is an emirp because it is prime and its reverse (1722536521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1256352271 - 2¹ = 1256352269 is a prime.

Together with 1256352269, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256352277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628176135 + 628176136.

It is an arithmetic number, because the mean of its divisors is an integer number (628176136).

Almost surely, 2^1256352271 is an apocalyptic number.

1256352271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256352271 is an equidigital number, since it uses as much as digits as its factorization.

1256352271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The square root of 1256352271 is about 35445.0598955623. The cubic root of 1256352271 is about 1079.0390031147.

Adding to 1256352271 its reverse (1722536521), we get a palindrome (2978888792).

The spelling of 1256352271 in words is "one billion, two hundred fifty-six million, three hundred fifty-two thousand, two hundred seventy-one".