1255859 has 12 divisors (see below), whose sum is σ = 1407672. Its totient is φ = 1119360.

The previous prime is 1255847. The next prime is 1255861. The reversal of 1255859 is 9585521.

It is a de Polignac number, because none of the positive numbers 2^k-1255859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1255829) 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 11 ways as a sum of consecutive naturals, for example, 11684 + ... + 11790.

It is an arithmetic number, because the mean of its divisors is an integer number (117306).

2^1255859 is an apocalyptic number.

1255859 is a deficient number, since it is larger than the sum of its proper divisors (151813).

1255859 is a wasteful number, since it uses less digits than its factorization.

1255859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 215 counting only the distinct ones).

The product of its digits is 18000, while the sum is 35.

The square root of 1255859 is about 1120.6511500016. The cubic root of 1255859 is about 107.8897766633.

The spelling of 1255859 in words is "one million, two hundred fifty-five thousand, eight hundred fifty-nine".