851406 has 16 divisors (see below), whose sum is σ = 1744848. Its totient is φ = 276800.

The previous prime is 851401. The next prime is 851413. The reversal of 851406 is 604158.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851406.

It is not an unprimeable number, because it can be changed into a prime (851401) by changing a digit.

851406 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1485 + ... + 1976.

It is an arithmetic number, because the mean of its divisors is an integer number (109053).

2⁸⁵¹⁴⁰⁶ is an apocalyptic number.

851406 is an abundant number, since it is smaller than the sum of its proper divisors (893442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851406 is a wasteful number, since it uses less digits than its factorization.

851406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 851406 is about 922.7166412285. The cubic root of 851406 is about 94.7790247172.

The spelling of 851406 in words is "eight hundred fifty-one thousand, four hundred six".