2405221 has 8 divisors (see below), whose sum is σ = 2960384. Its totient is φ = 1902960.

The previous prime is 2405213. The next prime is 2405239. The reversal of 2405221 is 1225042.

2405221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2405221 - 2³ = 2405213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2405195 and 2405204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2405251) 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 7 ways as a sum of consecutive naturals, for example, 13125 + ... + 13306.

It is an arithmetic number, because the mean of its divisors is an integer number (370048).

2^2405221 is an apocalyptic number.

It is an amenable number.

2405221 is a deficient number, since it is larger than the sum of its proper divisors (555163).

2405221 is a wasteful number, since it uses less digits than its factorization.

2405221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26451.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2405221 is about 1550.8774935500. The cubic root of 2405221 is about 133.9836060734.

The spelling of 2405221 in words is "two million, four hundred five thousand, two hundred twenty-one".