10851805 has 4 divisors (see below), whose sum is σ = 13022172. Its totient is φ = 8681440.

The previous prime is 10851787. The next prime is 10851809. The reversal of 10851805 is 50815801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50815801 = 29 ⋅1752269.

It can be written as a sum of positive squares in 2 ways, for example, as 4024036 + 6827769 = 2006^2 + 2613^2 .

It is not a de Polignac number, because 10851805 - 2¹⁷ = 10720733 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 (10851809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1085176 + ... + 1085185.

It is an arithmetic number, because the mean of its divisors is an integer number (3255543).

Almost surely, 2^10851805 is an apocalyptic number.

It is an amenable number.

10851805 is a deficient number, since it is larger than the sum of its proper divisors (2170367).

10851805 is an equidigital number, since it uses as much as digits as its factorization.

10851805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170366.

The product of its (nonzero) digits is 1600, while the sum is 28.

The square root of 10851805 is about 3294.2077955102. The cubic root of 10851805 is about 221.3947545602.

The spelling of 10851805 in words is "ten million, eight hundred fifty-one thousand, eight hundred five".