808641 has 6 divisors (see below), whose sum is σ = 1168050. Its totient is φ = 539088.

The previous prime is 808637. The next prime is 808651. The reversal of 808641 is 146808.

It can be written as a sum of positive squares in only one way, i.e., 705600 + 103041 = 840^2 + 321^2 .

It is not a de Polignac number, because 808641 - 2² = 808637 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (808601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 44916 + ... + 44933.

It is an arithmetic number, because the mean of its divisors is an integer number (194675).

2⁸⁰⁸⁶⁴¹ is an apocalyptic number.

It is an amenable number.

808641 is a deficient number, since it is larger than the sum of its proper divisors (359409).

808641 is a wasteful number, since it uses less digits than its factorization.

808641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89855 (or 89852 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 808641 is about 899.2446830535. The cubic root of 808641 is about 93.1648135394.

The spelling of 808641 in words is "eight hundred eight thousand, six hundred forty-one".