2122855 has 16 divisors (see below), whose sum is σ = 2939904. Its totient is φ = 1441440.

The previous prime is 2122853. The next prime is 2122859. The reversal of 2122855 is 5582212.

It is not a de Polignac number, because 2122855 - 2¹ = 2122853 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4354 + ... + 4816.

It is an arithmetic number, because the mean of its divisors is an integer number (183744).

2^2122855 is an apocalyptic number.

2122855 is a deficient number, since it is larger than the sum of its proper divisors (817049).

2122855 is a wasteful number, since it uses less digits than its factorization.

2122855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606.

The product of its digits is 1600, while the sum is 25.

The square root of 2122855 is about 1457.0020590239. The cubic root of 2122855 is about 128.5208069382.

Subtracting from 2122855 its sum of digits (25), we obtain a triangular number (2122830 = T₂₀₆₀).

The spelling of 2122855 in words is "two million, one hundred twenty-two thousand, eight hundred fifty-five".