2104345 has 16 divisors (see below), whose sum is σ = 2816640. Its totient is φ = 1499904.

The previous prime is 2104343. The next prime is 2104357. The reversal of 2104345 is 5434012.

It is a cyclic number.

It is not a de Polignac number, because 2104345 - 2¹ = 2104343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (2104343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 964 + ... + 2266.

It is an arithmetic number, because the mean of its divisors is an integer number (176040).

2^2104345 is an apocalyptic number.

It is an amenable number.

2104345 is a deficient number, since it is larger than the sum of its proper divisors (712295).

2104345 is a wasteful number, since it uses less digits than its factorization.

2104345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2104345 is about 1450.6360673856. The cubic root of 2104345 is about 128.1461749655.

Subtracting from 2104345 its sum of digits (19), we obtain a triangular number (2104326 = T₂₀₅₁).

Adding to 2104345 its reverse (5434012), we get a palindrome (7538357).

The spelling of 2104345 in words is "two million, one hundred four thousand, three hundred forty-five".