1255663 has 2 divisors, whose sum is σ = 1255664. Its totient is φ = 1255662.

The previous prime is 1255651. The next prime is 1255679. The reversal of 1255663 is 3665521.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1255633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627831 + 627832.

It is an arithmetic number, because the mean of its divisors is an integer number (627832).

2^1255663 is an apocalyptic number.

1255663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255663 is an equidigital number, since it uses as much as digits as its factorization.

1255663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5400, while the sum is 28.

The square root of 1255663 is about 1120.5636974309. The cubic root of 1255663 is about 107.8841636403.

The spelling of 1255663 in words is "one million, two hundred fifty-five thousand, six hundred sixty-three".