1256263 has 4 divisors (see below), whose sum is σ = 1283040. Its totient is φ = 1229488.

The previous prime is 1256243. The next prime is 1256267. The reversal of 1256263 is 3626521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1256263 - 2⁵ = 1256231 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256267) 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 in 3 ways as a sum of consecutive naturals, for example, 13318 + ... + 13411.

It is an arithmetic number, because the mean of its divisors is an integer number (320760).

2^1256263 is an apocalyptic number.

1256263 is a deficient number, since it is larger than the sum of its proper divisors (26777).

1256263 is an equidigital number, since it uses as much as digits as its factorization.

1256263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26776.

The product of its digits is 2160, while the sum is 25.

The square root of 1256263 is about 1120.8313878546. The cubic root of 1256263 is about 107.9013445216.

The spelling of 1256263 in words is "one million, two hundred fifty-six thousand, two hundred sixty-three".