1256993 has 2 divisors, whose sum is σ = 1256994. Its totient is φ = 1256992.

The previous prime is 1256989. The next prime is 1257013. The reversal of 1256993 is 3996521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1236544 + 20449 = 1112^2 + 143^2 .

It is an emirp because it is prime and its reverse (3996521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1256993 - 2² = 1256989 is a prime.

It is not a weakly prime, because it can be changed into another prime (1256903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628496 + 628497.

It is an arithmetic number, because the mean of its divisors is an integer number (628497).

2^1256993 is an apocalyptic number.

It is an amenable number.

1256993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256993 is an equidigital number, since it uses as much as digits as its factorization.

1256993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 1256993 is about 1121.1569916831. The cubic root of 1256993 is about 107.9222405520.

The spelling of 1256993 in words is "one million, two hundred fifty-six thousand, nine hundred ninety-three".