2049921 has 16 divisors (see below), whose sum is σ = 3169920. Its totient is φ = 1306800.

The previous prime is 2049919. The next prime is 2049941. The reversal of 2049921 is 1299402.

It is not a de Polignac number, because 2049921 - 2¹ = 2049919 is a prime.

It is a super-2 number, since 2×2049921² = 8404352212482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (2049941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030 + ... + 2271.

It is an arithmetic number, because the mean of its divisors is an integer number (198120).

2^2049921 is an apocalyptic number.

It is an amenable number.

2049921 is a deficient number, since it is larger than the sum of its proper divisors (1119999).

2049921 is a wasteful number, since it uses less digits than its factorization.

2049921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333 (or 3327 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2049921 is about 1431.7545180652. The cubic root of 2049921 is about 127.0317774450.

The spelling of 2049921 in words is "two million, forty-nine thousand, nine hundred twenty-one".