851229 has 24 divisors (see below), whose sum is σ = 1327872. Its totient is φ = 544320.

The previous prime is 851209. The next prime is 851231. The reversal of 851229 is 922158.

It is not a de Polignac number, because 851229 - 2⁵ = 851197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851209) 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 23 ways as a sum of consecutive naturals, for example, 7477 + ... + 7589.

It is an arithmetic number, because the mean of its divisors is an integer number (55328).

2⁸⁵¹²²⁹ is an apocalyptic number.

It is an amenable number.

851229 is a deficient number, since it is larger than the sum of its proper divisors (476643).

851229 is a wasteful number, since it uses less digits than its factorization.

851229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 147 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 851229 is about 922.6207238080. The cubic root of 851229 is about 94.7724563468.

The spelling of 851229 in words is "eight hundred fifty-one thousand, two hundred twenty-nine".