1263912271 has 2 divisors, whose sum is σ = 1263912272. Its totient is φ = 1263912270.

The previous prime is 1263912263. The next prime is 1263912313. The reversal of 1263912271 is 1722193621.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263912271 - 2³ = 1263912263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263912071) 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 as a sum of consecutive naturals, namely, 631956135 + 631956136.

It is an arithmetic number, because the mean of its divisors is an integer number (631956136).

Almost surely, 2^1263912271 is an apocalyptic number.

1263912271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263912271 is an equidigital number, since it uses as much as digits as its factorization.

1263912271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 1263912271 is about 35551.5438623979. The cubic root of 1263912271 is about 1081.1990201453.

The spelling of 1263912271 in words is "one billion, two hundred sixty-three million, nine hundred twelve thousand, two hundred seventy-one".