1287822271 has 2 divisors, whose sum is σ = 1287822272. Its totient is φ = 1287822270.

The previous prime is 1287822197. The next prime is 1287822281. The reversal of 1287822271 is 1722287821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1287822271 - 2¹⁹ = 1287297983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287822281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643911135 + 643911136.

It is an arithmetic number, because the mean of its divisors is an integer number (643911136).

Almost surely, 2^1287822271 is an apocalyptic number.

1287822271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287822271 is an equidigital number, since it uses as much as digits as its factorization.

1287822271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50176, while the sum is 40.

The square root of 1287822271 is about 35886.2406919421. The cubic root of 1287822271 is about 1087.9743178838.

The spelling of 1287822271 in words is "one billion, two hundred eighty-seven million, eight hundred twenty-two thousand, two hundred seventy-one".