859851 has 6 divisors (see below), whose sum is σ = 1242020. Its totient is φ = 573228.

The previous prime is 859849. The next prime is 859853. The reversal of 859851 is 158958.

It is an interprime number because it is at equal distance from previous prime (859849) and next prime (859853).

It is not a de Polignac number, because 859851 - 2¹ = 859849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859853) 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, 47761 + ... + 47778.

2⁸⁵⁹⁸⁵¹ is an apocalyptic number.

859851 is a deficient number, since it is larger than the sum of its proper divisors (382169).

859851 is a wasteful number, since it uses less digits than its factorization.

859851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95545 (or 95542 counting only the distinct ones).

The product of its digits is 14400, while the sum is 36.

The square root of 859851 is about 927.2815106536. The cubic root of 859851 is about 95.0913617858.

It can be divided in two parts, 8598 and 51, that added together give a square (8649 = 93²).

The spelling of 859851 in words is "eight hundred fifty-nine thousand, eight hundred fifty-one".