900855 has 16 divisors (see below), whose sum is σ = 1601760. Its totient is φ = 480384.

The previous prime is 900821. The next prime is 900863. The reversal of 900855 is 558009.

It is not a de Polignac number, because 900855 - 2¹⁰ = 899831 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3202 + ... + 3471.

It is an arithmetic number, because the mean of its divisors is an integer number (100110).

2⁹⁰⁰⁸⁵⁵ is an apocalyptic number.

900855 is a deficient number, since it is larger than the sum of its proper divisors (700905).

900855 is a wasteful number, since it uses less digits than its factorization.

900855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6687 (or 6681 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 900855 is about 949.1338156446. The cubic root of 900855 is about 96.5795026145.

The spelling of 900855 in words is "nine hundred thousand, eight hundred fifty-five".