851329 has 4 divisors (see below), whose sum is σ = 859860. Its totient is φ = 842800.

The previous prime is 851327. The next prime is 851351. The reversal of 851329 is 923158.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 332929 = 720^2 + 577^2 .

It is a cyclic number.

It is not a de Polignac number, because 851329 - 2¹ = 851327 is a prime.

It is a super-2 number, since 2×851329² = 1449522132482, which contains 22 as substring.

It is a Duffinian number.

851329 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 851297 and 851306.

It is not an unprimeable number, because it can be changed into a prime (851321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4114 + ... + 4315.

It is an arithmetic number, because the mean of its divisors is an integer number (214965).

2⁸⁵¹³²⁹ is an apocalyptic number.

It is an amenable number.

851329 is a deficient number, since it is larger than the sum of its proper divisors (8531).

851329 is a wasteful number, since it uses less digits than its factorization.

851329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8530.

The product of its digits is 2160, while the sum is 28.

The square root of 851329 is about 922.6749156664. The cubic root of 851329 is about 94.7761674024.

The spelling of 851329 in words is "eight hundred fifty-one thousand, three hundred twenty-nine".