1255705 has 24 divisors (see below), whose sum is σ = 1768320. Its totient is φ = 848640.

The previous prime is 1255693. The next prime is 1255721. The reversal of 1255705 is 5075521.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1255705 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1255705.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15856 + ... + 15934.

It is an arithmetic number, because the mean of its divisors is an integer number (73680).

2^1255705 is an apocalyptic number.

It is an amenable number.

1255705 is a deficient number, since it is larger than the sum of its proper divisors (512615).

1255705 is a wasteful number, since it uses less digits than its factorization.

1255705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 1255705 is about 1120.5824378420. The cubic root of 1255705 is about 107.8853664801.

The spelling of 1255705 in words is "one million, two hundred fifty-five thousand, seven hundred five".