2164345 has 4 divisors (see below), whose sum is σ = 2597220. Its totient is φ = 1731472.

The previous prime is 2164313. The next prime is 2164367. The reversal of 2164345 is 5434612.

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 1557504 + 606841 = 1248^2 + 779^2 .

It is a cyclic number.

It is not a de Polignac number, because 2164345 - 2⁵ = 2164313 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 6³ + 4³ + 3¹¹ + 4⁵ + 5⁹ .

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, 216430 + ... + 216439.

It is an arithmetic number, because the mean of its divisors is an integer number (649305).

2^2164345 is an apocalyptic number.

It is an amenable number.

2164345 is a deficient number, since it is larger than the sum of its proper divisors (432875).

2164345 is an equidigital number, since it uses as much as digits as its factorization.

2164345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432874.

The product of its digits is 2880, while the sum is 25.

The square root of 2164345 is about 1471.1713020583. The cubic root of 2164345 is about 129.3526994476.

Adding to 2164345 its reverse (5434612), we get a palindrome (7598957).

The spelling of 2164345 in words is "two million, one hundred sixty-four thousand, three hundred forty-five".