855555 has 8 divisors (see below), whose sum is σ = 1368912. Its totient is φ = 456288.

The previous prime is 855527. The next prime is 855581. The reversal of 855555 is 555558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 855555 - 2⁷ = 855427 is a prime.

855555 is a modest number, since divided by 5555 gives 85 as remainder.

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 855555.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28504 + ... + 28533.

It is an arithmetic number, because the mean of its divisors is an integer number (171114).

2⁸⁵⁵⁵⁵⁵ is an apocalyptic number.

855555 is a deficient number, since it is larger than the sum of its proper divisors (513357).

855555 is a wasteful number, since it uses less digits than its factorization.

855555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57045.

The product of its digits is 25000, while the sum is 33.

The square root of 855555 is about 924.9621613882. The cubic root of 855555 is about 94.9327316961.

The spelling of 855555 in words is "eight hundred fifty-five thousand, five hundred fifty-five".