851201 has 8 divisors (see below), whose sum is σ = 939624. Its totient is φ = 766080.

The previous prime is 851197. The next prime is 851203. The reversal of 851201 is 102158.

851201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 50176 + 801025 = 224^2 + 895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 851201 - 2² = 851197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851201.

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 851201.

It is not an unprimeable number, because it can be changed into a prime (851203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266 + ... + 1331.

It is an arithmetic number, because the mean of its divisors is an integer number (117453).

2⁸⁵¹²⁰¹ is an apocalyptic number.

851201 is the 533-rd octagonal number.

It is an amenable number.

851201 is a deficient number, since it is larger than the sum of its proper divisors (88423).

851201 is a wasteful number, since it uses less digits than its factorization.

851201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 851201 is about 922.6055495172. The cubic root of 851201 is about 94.7714171991.

Adding to 851201 its reverse (102158), we get a palindrome (953359).

The spelling of 851201 in words is "eight hundred fifty-one thousand, two hundred one".