1296556057 has 2 divisors, whose sum is σ = 1296556058. Its totient is φ = 1296556056.

The previous prime is 1296556007. The next prime is 1296556111. The reversal of 1296556057 is 7506556921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254293056 + 42263001 = 35416^2 + 6501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296556057 - 2⁷ = 1296555929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1296555998 and 1296556016.

It is not a weakly prime, because it can be changed into another prime (1296556007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648278028 + 648278029.

It is an arithmetic number, because the mean of its divisors is an integer number (648278029).

Almost surely, 2^1296556057 is an apocalyptic number.

It is an amenable number.

1296556057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296556057 is an equidigital number, since it uses as much as digits as its factorization.

1296556057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567000, while the sum is 46.

The square root of 1296556057 is about 36007.7221856646. The cubic root of 1296556057 is about 1090.4282628213.

The spelling of 1296556057 in words is "one billion, two hundred ninety-six million, five hundred fifty-six thousand, fifty-seven".