2199421 has 16 divisors (see below), whose sum is σ = 2764800. Its totient is φ = 1705968.

The previous prime is 2199401. The next prime is 2199427. The reversal of 2199421 is 1249912.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2199421 - 2⁹ = 2198909 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 2199421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2700 + ... + 3418.

It is an arithmetic number, because the mean of its divisors is an integer number (172800).

2^2199421 is an apocalyptic number.

It is an amenable number.

2199421 is a deficient number, since it is larger than the sum of its proper divisors (565379).

2199421 is a wasteful number, since it uses less digits than its factorization.

2199421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its digits is 1296, while the sum is 28.

The square root of 2199421 is about 1483.0445037152. The cubic root of 2199421 is about 130.0477339500.

The spelling of 2199421 in words is "two million, one hundred ninety-nine thousand, four hundred twenty-one".