2206145 has 4 divisors (see below), whose sum is σ = 2647380. Its totient is φ = 1764912.

The previous prime is 2206123. The next prime is 2206151. The reversal of 2206145 is 5416022.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 323761 + 1882384 = 569^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 2206145 - 2⁶ = 2206081 is a prime.

It is a super-2 number, since 2×2206145² = 9734151522050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220610 + ... + 220619.

It is an arithmetic number, because the mean of its divisors is an integer number (661845).

2^2206145 is an apocalyptic number.

It is an amenable number.

2206145 is a deficient number, since it is larger than the sum of its proper divisors (441235).

2206145 is an equidigital number, since it uses as much as digits as its factorization.

2206145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441234.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2206145 is about 1485.3097320088. The cubic root of 2206145 is about 130.1801250610.

The spelling of 2206145 in words is "two million, two hundred six thousand, one hundred forty-five".