855011 has 4 divisors (see below), whose sum is σ = 882624. Its totient is φ = 827400.

The previous prime is 854999. The next prime is 855031. The reversal of 855011 is 110558.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-855011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855031) 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, 13760 + ... + 13821.

It is an arithmetic number, because the mean of its divisors is an integer number (220656).

2⁸⁵⁵⁰¹¹ is an apocalyptic number.

855011 is a deficient number, since it is larger than the sum of its proper divisors (27613).

855011 is a wasteful number, since it uses less digits than its factorization.

855011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27612.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 855011 is about 924.6680485450. The cubic root of 855011 is about 94.9126066094.

Adding to 855011 its reverse (110558), we get a palindrome (965569).

The spelling of 855011 in words is "eight hundred fifty-five thousand, eleven".