855611 has 4 divisors (see below), whose sum is σ = 858000. Its totient is φ = 853224.

The previous prime is 855607. The next prime is 855619. The reversal of 855611 is 116558.

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

It is a cyclic number.

It is not a de Polignac number, because 855611 - 2² = 855607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855619) 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, 536 + ... + 1413.

It is an arithmetic number, because the mean of its divisors is an integer number (214500).

2⁸⁵⁵⁶¹¹ is an apocalyptic number.

855611 is a deficient number, since it is larger than the sum of its proper divisors (2389).

855611 is a wasteful number, since it uses less digits than its factorization.

855611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388.

The product of its digits is 1200, while the sum is 26.

The square root of 855611 is about 924.9924324015. The cubic root of 855611 is about 94.9348029119.

The spelling of 855611 in words is "eight hundred fifty-five thousand, six hundred eleven".