2170249 has 4 divisors (see below), whose sum is σ = 2174020. Its totient is φ = 2166480.

The previous prime is 2170247. The next prime is 2170261. The reversal of 2170249 is 9420712.

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 1254400 + 915849 = 1120^2 + 957^2 .

It is a cyclic number.

It is not a de Polignac number, because 2170249 - 2¹ = 2170247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2170241) 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, 822 + ... + 2239.

It is an arithmetic number, because the mean of its divisors is an integer number (543505).

2^2170249 is an apocalyptic number.

It is an amenable number.

2170249 is a deficient number, since it is larger than the sum of its proper divisors (3771).

2170249 is an equidigital number, since it uses as much as digits as its factorization.

2170249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2170249 is about 1473.1764999483. The cubic root of 2170249 is about 129.4702107456.

The spelling of 2170249 in words is "two million, one hundred seventy thousand, two hundred forty-nine".