2145228 has 24 divisors (see below), whose sum is σ = 5101488. Its totient is φ = 701376.

The previous prime is 2145197. The next prime is 2145239. The reversal of 2145228 is 8225412.

2145228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2145198 and 2145207.

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 7 ways as a sum of consecutive naturals, for example, 1051 + ... + 2322.

It is an arithmetic number, because the mean of its divisors is an integer number (212562).

2^2145228 is an apocalyptic number.

It is an amenable number.

2145228 is an abundant number, since it is smaller than the sum of its proper divisors (2956260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145228 is a wasteful number, since it uses less digits than its factorization.

2145228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433 (or 3431 counting only the distinct ones).

The product of its digits is 1280, while the sum is 24.

The square root of 2145228 is about 1464.6596874360. The cubic root of 2145228 is about 128.9707282902.

The spelling of 2145228 in words is "two million, one hundred forty-five thousand, two hundred twenty-eight".