808261 has 2 divisors, whose sum is σ = 808262. Its totient is φ = 808260.

The previous prime is 808237. The next prime is 808267. The reversal of 808261 is 162808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799236 + 9025 = 894^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 808261 - 2⁵ = 808229 is a prime.

808261 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (808267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404130 + 404131.

It is an arithmetic number, because the mean of its divisors is an integer number (404131).

2⁸⁰⁸²⁶¹ is an apocalyptic number.

It is an amenable number.

808261 is a deficient number, since it is larger than the sum of its proper divisors (1).

808261 is an equidigital number, since it uses as much as digits as its factorization.

808261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 808261 is about 899.0333697922. The cubic root of 808261 is about 93.1502177850.

The spelling of 808261 in words is "eight hundred eight thousand, two hundred sixty-one".