2206745 has 4 divisors (see below), whose sum is σ = 2648100. Its totient is φ = 1765392.

The previous prime is 2206741. The next prime is 2206747. The reversal of 2206745 is 5476022.

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 891136 + 1315609 = 944^2 + 1147^2 .

It is a cyclic number.

It is not a de Polignac number, because 2206745 - 2² = 2206741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2206741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220670 + ... + 220679.

It is an arithmetic number, because the mean of its divisors is an integer number (662025).

2^2206745 is an apocalyptic number.

It is an amenable number.

2206745 is a deficient number, since it is larger than the sum of its proper divisors (441355).

2206745 is an equidigital number, since it uses as much as digits as its factorization.

2206745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441354.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 2206745 is about 1485.5116963525. The cubic root of 2206745 is about 130.1919255841.

The spelling of 2206745 in words is "two million, two hundred six thousand, seven hundred forty-five".