1256023 has 2 divisors, whose sum is σ = 1256024. Its totient is φ = 1256022.

The previous prime is 1256009. The next prime is 1256029. The reversal of 1256023 is 3206521.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1256023 - 2¹⁷ = 1124951 is a prime.

1256023 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256029) 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, 628011 + 628012.

It is an arithmetic number, because the mean of its divisors is an integer number (628012).

2^1256023 is an apocalyptic number.

1256023 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256023 is an equidigital number, since it uses as much as digits as its factorization.

1256023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 1256023 is about 1120.7243193578. The cubic root of 1256023 is about 107.8944728257.

It can be divided in two parts, 12 and 56023, that multiplied together give a palindrome (672276).

The spelling of 1256023 in words is "one million, two hundred fifty-six thousand, twenty-three".