855655 has 4 divisors (see below), whose sum is σ = 1026792. Its totient is φ = 684520.

The previous prime is 855641. The next prime is 855667. The reversal of 855655 is 556558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556558 = 2 ⋅278279.

It is not a de Polignac number, because 855655 - 2⁷ = 855527 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 855655.

It is a congruent number.

It is an unprimeable number.

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, 85561 + ... + 85570.

It is an arithmetic number, because the mean of its divisors is an integer number (256698).

2⁸⁵⁵⁶⁵⁵ is an apocalyptic number.

855655 is a deficient number, since it is larger than the sum of its proper divisors (171137).

855655 is a wasteful number, since it uses less digits than its factorization.

855655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171136.

The product of its digits is 30000, while the sum is 34.

The square root of 855655 is about 925.0162160741. The cubic root of 855655 is about 94.9364302323.

The spelling of 855655 in words is "eight hundred fifty-five thousand, six hundred fifty-five".