857011 has 2 divisors, whose sum is σ = 857012.
Its totient is φ = 857010.
The previous prime is 857009. The next prime is 857027. The reversal of 857011 is 110758.
Adding to 857011 its reverse (110758), we get a palindrome (967769).
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 857011 - 21 = 857009 is a prime.
Together with 857009, it forms a pair of twin primes.
857011 is a lucky number.
It is not a weakly prime, because it can be changed into another prime (857081) 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 as a sum of consecutive naturals, namely, 428505 + 428506.
It is an arithmetic number, because the mean of its divisors is an integer number (428506).
2857011 is an apocalyptic number.
857011 is a deficient number, since it is larger than the sum of its proper divisors (1).
857011 is an equidigital number, since it uses as much as digits as its factorization.
857011 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 280, while the sum is 22.
The square root of 857011 is about 925.7488860377.
The cubic root of 857011 is about 94.9865539603.
The spelling of 857011 in words is "eight hundred fifty-seven thousand, eleven".