1256897 has 2 divisors, whose sum is σ = 1256898. Its totient is φ = 1256896.

The previous prime is 1256891. The next prime is 1256903. The reversal of 1256897 is 7986521.

It is a balanced prime because it is at equal distance from previous prime (1256891) and next prime (1256903).

It can be written as a sum of positive squares in only one way, i.e., 1256641 + 256 = 1121^2 + 16^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256897 is a prime.

It is a super-3 number, since 3×1256897³ = 5956900193593338819, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1256897.

It is not a weakly prime, because it can be changed into another prime (1256891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628448 + 628449.

It is an arithmetic number, because the mean of its divisors is an integer number (628449).

2^1256897 is an apocalyptic number.

It is an amenable number.

1256897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256897 is an equidigital number, since it uses as much as digits as its factorization.

1256897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 38.

The square root of 1256897 is about 1121.1141779498. The cubic root of 1256897 is about 107.9194930429.

The spelling of 1256897 in words is "one million, two hundred fifty-six thousand, eight hundred ninety-seven".