1296556487 has 2 divisors, whose sum is σ = 1296556488. Its totient is φ = 1296556486.

The previous prime is 1296556451. The next prime is 1296556559. The reversal of 1296556487 is 7846556921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1296556487 - 2⁸ = 1296556231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296556787) 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, 648278243 + 648278244.

It is an arithmetic number, because the mean of its divisors is an integer number (648278244).

Almost surely, 2^1296556487 is an apocalyptic number.

1296556487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296556487 is an equidigital number, since it uses as much as digits as its factorization.

1296556487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3628800, while the sum is 53.

The square root of 1296556487 is about 36007.7281566055. The cubic root of 1296556487 is about 1090.4283833673.

The spelling of 1296556487 in words is "one billion, two hundred ninety-six million, five hundred fifty-six thousand, four hundred eighty-seven".