1256393 has 2 divisors, whose sum is σ = 1256394. Its totient is φ = 1256392.

The previous prime is 1256389. The next prime is 1256407. The reversal of 1256393 is 3936521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 719104 + 537289 = 848^2 + 733^2 .

It is a cyclic number.

It is not a de Polignac number, because 1256393 - 2² = 1256389 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628196 + 628197.

It is an arithmetic number, because the mean of its divisors is an integer number (628197).

2^1256393 is an apocalyptic number.

It is an amenable number.

1256393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256393 is an equidigital number, since it uses as much as digits as its factorization.

1256393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 29.

The square root of 1256393 is about 1120.8893790201. The cubic root of 1256393 is about 107.9050663248.

The spelling of 1256393 in words is "one million, two hundred fifty-six thousand, three hundred ninety-three".