1255566 has 16 divisors (see below), whose sum is σ = 2704464. Its totient is φ = 386304.

The previous prime is 1255559. The next prime is 1255567. The reversal of 1255566 is 6655521.

It is a Curzon number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255567) 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, 7971 + ... + 8126.

It is an arithmetic number, because the mean of its divisors is an integer number (169029).

2^1255566 is an apocalyptic number.

1255566 is an abundant number, since it is smaller than the sum of its proper divisors (1448898).

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

1255566 is a wasteful number, since it uses less digits than its factorization.

1255566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16115.

The product of its digits is 9000, while the sum is 30.

The square root of 1255566 is about 1120.5204148073. The cubic root of 1255566 is about 107.8813855506.

It can be divided in two parts, 12555 and 66, that added together give a palindrome (12621).

The spelling of 1255566 in words is "one million, two hundred fifty-five thousand, five hundred sixty-six".