805860251 has 16 divisors (see below), whose sum is σ = 929625600. Its totient is φ = 684288000.

The previous prime is 805860227. The next prime is 805860301. The reversal of 805860251 is 152068508.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 805860251 - 2¹⁸ = 805598107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (805862251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356876 + ... + 359126.

It is an arithmetic number, because the mean of its divisors is an integer number (58101600).

Almost surely, 2^805860251 is an apocalyptic number.

805860251 is a deficient number, since it is larger than the sum of its proper divisors (123765349).

805860251 is a wasteful number, since it uses less digits than its factorization.

805860251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 805860251 is about 28387.6778021733. The cubic root of 805860251 is about 930.5789939119.

The spelling of 805860251 in words is "eight hundred five million, eight hundred sixty thousand, two hundred fifty-one".