1297956859 has 2 divisors, whose sum is σ = 1297956860. Its totient is φ = 1297956858.

The previous prime is 1297956839. The next prime is 1297956889. The reversal of 1297956859 is 9586597921.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297956859 is a prime.

It is a super-3 number, since 3×1297956859³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1297956797 and 1297956806.

It is not a weakly prime, because it can be changed into another prime (1297956839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648978429 + 648978430.

It is an arithmetic number, because the mean of its divisors is an integer number (648978430).

Almost surely, 2^1297956859 is an apocalyptic number.

1297956859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297956859 is an equidigital number, since it uses as much as digits as its factorization.

1297956859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12247200, while the sum is 61.

The square root of 1297956859 is about 36027.1683455694. The cubic root of 1297956859 is about 1090.8208218414.

The spelling of 1297956859 in words is "one billion, two hundred ninety-seven million, nine hundred fifty-six thousand, eight hundred fifty-nine".