1271646253 has 2 divisors, whose sum is σ = 1271646254. Its totient is φ = 1271646252.

The previous prime is 1271646227. The next prime is 1271646347. The reversal of 1271646253 is 3526461721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1032851044 + 238795209 = 32138^2 + 15453^2 .

It is a cyclic number.

It is not a de Polignac number, because 1271646253 - 2⁹ = 1271645741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1271646653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635823126 + 635823127.

It is an arithmetic number, because the mean of its divisors is an integer number (635823127).

Almost surely, 2^1271646253 is an apocalyptic number.

It is an amenable number.

1271646253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271646253 is an equidigital number, since it uses as much as digits as its factorization.

1271646253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 1271646253 is about 35660.1493687281. The cubic root of 1271646253 is about 1083.3998521259.

The spelling of 1271646253 in words is "one billion, two hundred seventy-one million, six hundred forty-six thousand, two hundred fifty-three".