806251 has 4 divisors (see below), whose sum is σ = 815400. Its totient is φ = 797104.

The previous prime is 806233. The next prime is 806257. The reversal of 806251 is 152608.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 806251 - 2¹¹ = 804203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (806257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4441 + ... + 4618.

It is an arithmetic number, because the mean of its divisors is an integer number (203850).

2⁸⁰⁶²⁵¹ is an apocalyptic number.

806251 is a deficient number, since it is larger than the sum of its proper divisors (9149).

806251 is an equidigital number, since it uses as much as digits as its factorization.

806251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9148.

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

The square root of 806251 is about 897.9148066493. The cubic root of 806251 is about 93.0729377329.

Adding to 806251 its reverse (152608), we get a palindrome (958859).

The spelling of 806251 in words is "eight hundred six thousand, two hundred fifty-one".