2128855 has 8 divisors (see below), whose sum is σ = 2689200. Its totient is φ = 1613376.

The previous prime is 2128849. The next prime is 2128871. The reversal of 2128855 is 5588212.

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

It is a cyclic number.

It is not a de Polignac number, because 2128855 - 2⁵ = 2128823 is a prime.

It is a super-2 number, since 2×2128855² = 9064047222050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11110 + ... + 11299.

It is an arithmetic number, because the mean of its divisors is an integer number (336150).

2^2128855 is an apocalyptic number.

2128855 is a deficient number, since it is larger than the sum of its proper divisors (560345).

2128855 is a wasteful number, since it uses less digits than its factorization.

2128855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22433.

The product of its digits is 6400, while the sum is 31.

The square root of 2128855 is about 1459.0596286650. The cubic root of 2128855 is about 128.6417760235.

The spelling of 2128855 in words is "two million, one hundred twenty-eight thousand, eight hundred fifty-five".