2104945 has 8 divisors (see below), whose sum is σ = 2539944. Its totient is φ = 1674624.

The previous prime is 2104933. The next prime is 2104951. The reversal of 2104945 is 5494012.

It can be written as a sum of positive squares in 4 ways, for example, as 258064 + 1846881 = 508^2 + 1359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2104945 - 2⁵ = 2104913 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84 + ... + 2053.

It is an arithmetic number, because the mean of its divisors is an integer number (317493).

2^2104945 is an apocalyptic number.

It is an amenable number.

2104945 is a deficient number, since it is larger than the sum of its proper divisors (434999).

2104945 is a wasteful number, since it uses less digits than its factorization.

2104945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2339.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2104945 is about 1450.8428584792. The cubic root of 2104945 is about 128.1583530064.

Adding to 2104945 its reverse (5494012), we get a palindrome (7598957).

The spelling of 2104945 in words is "two million, one hundred four thousand, nine hundred forty-five".