2104321 has 4 divisors (see below), whose sum is σ = 2119600. Its totient is φ = 2089044.

The previous prime is 2104313. The next prime is 2104337. The reversal of 2104321 is 1234012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2104321 - 2³ = 2104313 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7431 + ... + 7708.

It is an arithmetic number, because the mean of its divisors is an integer number (529900).

2^2104321 is an apocalyptic number.

It is an amenable number.

2104321 is a deficient number, since it is larger than the sum of its proper divisors (15279).

2104321 is a wasteful number, since it uses less digits than its factorization.

2104321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15278.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2104321 is about 1450.6277951287. The cubic root of 2104321 is about 128.1456877957.

Adding to 2104321 its reverse (1234012), we get a palindrome (3338333).

The spelling of 2104321 in words is "two million, one hundred four thousand, three hundred twenty-one".