849851 has 4 divisors (see below), whose sum is σ = 894600. Its totient is φ = 805104.

The previous prime is 849839. The next prime is 849857. The reversal of 849851 is 158948.

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 849851 - 2¹⁴ = 833467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849857) 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, 22346 + ... + 22383.

It is an arithmetic number, because the mean of its divisors is an integer number (223650).

2⁸⁴⁹⁸⁵¹ is an apocalyptic number.

849851 is a deficient number, since it is larger than the sum of its proper divisors (44749).

849851 is a wasteful number, since it uses less digits than its factorization.

849851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44748.

The product of its digits is 11520, while the sum is 35.

The square root of 849851 is about 921.8736355922. The cubic root of 849851 is about 94.7212883768.

The spelling of 849851 in words is "eight hundred forty-nine thousand, eight hundred fifty-one".