2104405 has 8 divisors (see below), whose sum is σ = 2554200. Its totient is φ = 1664256.
The previous prime is 2104397. The next prime is 2104423. The reversal of 2104405 is 5044012.
It can be written as a sum of positive squares in 4 ways, for example, as 56644 + 2047761 = 238^2 + 1431^2 .
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 2104405 - 23 = 2104397 is a prime.
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, 1920 + ... + 2809.
It is an arithmetic number, because the mean of its divisors is an integer number (319275).
22104405 is an apocalyptic number.
It is an amenable number.
2104405 is a deficient number, since it is larger than the sum of its proper divisors (449795).
2104405 is an equidigital number, since it uses as much as digits as its factorization.
2104405 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4823.
The product of its (nonzero) digits is 160, while the sum is 16.
The square root of 2104405 is about 1450.6567478215. The cubic root of 2104405 is about 128.1473928737.
Adding to 2104405 its reverse (5044012), we get a palindrome (7148417).
The spelling of 2104405 in words is "two million, one hundred four thousand, four hundred five".
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