2221409 has 8 divisors (see below), whose sum is σ = 2358720. Its totient is φ = 2087536.

The previous prime is 2221403. The next prime is 2221411. The reversal of 2221409 is 9041222.

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 2221409 - 2²⁰ = 1172833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221403) 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, 539 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

2^2221409 is an apocalyptic number.

It is an amenable number.

2221409 is a deficient number, since it is larger than the sum of its proper divisors (137311).

2221409 is a wasteful number, since it uses less digits than its factorization.

2221409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1719.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2221409 is about 1490.4391970154. The cubic root of 2221409 is about 130.4796678100.

The spelling of 2221409 in words is "two million, two hundred twenty-one thousand, four hundred nine".