2003921 has 8 divisors (see below), whose sum is σ = 2108544. Its totient is φ = 1900800.

The previous prime is 2003917. The next prime is 2003927. The reversal of 2003921 is 1293002.

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 2003921 - 2² = 2003917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2003921.

It is not an unprimeable number, because it can be changed into a prime (2003927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3185 + ... + 3761.

It is an arithmetic number, because the mean of its divisors is an integer number (263568).

2^2003921 is an apocalyptic number.

It is an amenable number.

2003921 is a deficient number, since it is larger than the sum of its proper divisors (104623).

2003921 is a wasteful number, since it uses less digits than its factorization.

2003921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2003921 is about 1415.5991664309. The cubic root of 2003921 is about 126.0743870822.

Adding to 2003921 its reverse (1293002), we get a palindrome (3296923).

The spelling of 2003921 in words is "two million, three thousand, nine hundred twenty-one".