857201 has 2 divisors, whose sum is σ = 857202. Its totient is φ = 857200.

The previous prime is 857167. The next prime is 857203. The reversal of 857201 is 102758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602176 + 255025 = 776^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 857201 - 2⁶ = 857137 is a prime.

It is a Sophie Germain prime.

Together with 857203, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (857203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428600 + 428601.

It is an arithmetic number, because the mean of its divisors is an integer number (428601).

2⁸⁵⁷²⁰¹ is an apocalyptic number.

It is an amenable number.

857201 is a deficient number, since it is larger than the sum of its proper divisors (1).

857201 is an equidigital number, since it uses as much as digits as its factorization.

857201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 857201 is about 925.8514999718. The cubic root of 857201 is about 94.9935729724.

Adding to 857201 its reverse (102758), we get a palindrome (959959).

The spelling of 857201 in words is "eight hundred fifty-seven thousand, two hundred one".