805266 has 72 divisors (see below), whose sum is σ = 2240784. Its totient is φ = 206640.

The previous prime is 805249. The next prime is 805267. The reversal of 805266 is 662508.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (805267) by changing a digit.

805266 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9661 + ... + 9743.

It is an arithmetic number, because the mean of its divisors is an integer number (31122).

2⁸⁰⁵²⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 805266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1120392).

805266 is an abundant number, since it is smaller than the sum of its proper divisors (1435518).

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

805266 is a wasteful number, since it uses less digits than its factorization.

805266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 805266 is about 897.3661460073. The cubic root of 805266 is about 93.0350197632.

It can be divided in two parts, 8052 and 66, that added together give a palindrome (8118).

The spelling of 805266 in words is "eight hundred five thousand, two hundred sixty-six".