1297262287 has 2 divisors, whose sum is σ = 1297262288. Its totient is φ = 1297262286.

The previous prime is 1297262257. The next prime is 1297262327. The reversal of 1297262287 is 7822627921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1297262287 - 2²³ = 1288873679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297262257) 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, 648631143 + 648631144.

It is an arithmetic number, because the mean of its divisors is an integer number (648631144).

Almost surely, 2^1297262287 is an apocalyptic number.

1297262287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297262287 is an equidigital number, since it uses as much as digits as its factorization.

1297262287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 46.

The square root of 1297262287 is about 36017.5274970395. The cubic root of 1297262287 is about 1090.6262111650.

The spelling of 1297262287 in words is "one billion, two hundred ninety-seven million, two hundred sixty-two thousand, two hundred eighty-seven".