4220405 has 16 divisors (see below), whose sum is σ = 5946240. Its totient is φ = 2814912.

The previous prime is 4220393. The next prime is 4220423. The reversal of 4220405 is 5040224.

It is a cyclic number.

It is not a de Polignac number, because 4220405 - 2¹⁶ = 4154869 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 335 + ... + 2924.

It is an arithmetic number, because the mean of its divisors is an integer number (371640).

Almost surely, 2^4220405 is an apocalyptic number.

It is an amenable number.

4220405 is a deficient number, since it is larger than the sum of its proper divisors (1725835).

4220405 is a wasteful number, since it uses less digits than its factorization.

4220405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3308.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 4220405 is about 2054.3624315101. The cubic root of 4220405 is about 161.6037284087.

Adding to 4220405 its reverse (5040224), we get a palindrome (9260629).

The spelling of 4220405 in words is "four million, two hundred twenty thousand, four hundred five".