12565271287 has 2 divisors, whose sum is σ = 12565271288. Its totient is φ = 12565271286.

The previous prime is 12565271269. The next prime is 12565271297. The reversal of 12565271287 is 78217256521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12565271287 - 2¹⁵ = 12565238519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12565271207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282635643 + 6282635644.

It is an arithmetic number, because the mean of its divisors is an integer number (6282635644).

Almost surely, 2^12565271287 is an apocalyptic number.

12565271287 is a deficient number, since it is larger than the sum of its proper divisors (1).

12565271287 is an equidigital number, since it uses as much as digits as its factorization.

12565271287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470400, while the sum is 46.

The spelling of 12565271287 in words is "twelve billion, five hundred sixty-five million, two hundred seventy-one thousand, two hundred eighty-seven".