805261 has 8 divisors (see below), whose sum is σ = 840224. Its totient is φ = 771120.

The previous prime is 805249. The next prime is 805267. The reversal of 805261 is 162508.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 805261 - 2¹⁵ = 772493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805267) 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, 2470 + ... + 2776.

It is an arithmetic number, because the mean of its divisors is an integer number (105028).

2⁸⁰⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

805261 is a deficient number, since it is larger than the sum of its proper divisors (34963).

805261 is a wasteful number, since it uses less digits than its factorization.

805261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 805261 is about 897.3633600722. The cubic root of 805261 is about 93.0348272073.

Adding to 805261 its reverse (162508), we get a palindrome (967769).

The spelling of 805261 in words is "eight hundred five thousand, two hundred sixty-one".