1255803 has 4 divisors (see below), whose sum is σ = 1674408. Its totient is φ = 837200.

The previous prime is 1255801. The next prime is 1255811. The reversal of 1255803 is 3085521.

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 1255803 - 2¹ = 1255801 is a prime.

It is a D-number.

1255803 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1255801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209298 + ... + 209303.

It is an arithmetic number, because the mean of its divisors is an integer number (418602).

2^1255803 is an apocalyptic number.

1255803 is a deficient number, since it is larger than the sum of its proper divisors (418605).

1255803 is an equidigital number, since it uses as much as digits as its factorization.

1255803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418604.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1255803 is about 1120.6261642493. The cubic root of 1255803 is about 107.8881730021. Note that the first 3 decimals are identical.

The spelling of 1255803 in words is "one million, two hundred fifty-five thousand, eight hundred three".