1255818 has 16 divisors (see below), whose sum is σ = 2523456. Its totient is φ = 416640.

The previous prime is 1255811. The next prime is 1255829. The reversal of 1255818 is 8185521.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1255811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1530 + ... + 2202.

It is an arithmetic number, because the mean of its divisors is an integer number (157716).

2^1255818 is an apocalyptic number.

1255818 is an abundant number, since it is smaller than the sum of its proper divisors (1267638).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1255818 is a wasteful number, since it uses less digits than its factorization.

1255818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989.

The product of its digits is 3200, while the sum is 30.

The square root of 1255818 is about 1120.6328569161. The cubic root of 1255818 is about 107.8886025589. Note that the first 3 decimals are identical.

The spelling of 1255818 in words is "one million, two hundred fifty-five thousand, eight hundred eighteen".