4166421 has 16 divisors (see below), whose sum is σ = 6480000. Its totient is φ = 2380224.

The previous prime is 4166419. The next prime is 4166447. The reversal of 4166421 is 1246614.

It is not a de Polignac number, because 4166421 - 2¹ = 4166419 is a prime.

It is a Curzon number.

4166421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4166391 and 4166400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4166321) 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, 996 + ... + 3053.

It is an arithmetic number, because the mean of its divisors is an integer number (405000).

Almost surely, 2^4166421 is an apocalyptic number.

It is an amenable number.

4166421 is a deficient number, since it is larger than the sum of its proper divisors (2313579).

4166421 is an equidigital number, since it uses as much as digits as its factorization.

4166421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073 (or 4059 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 4166421 is about 2041.1812756343. The cubic root of 4166421 is about 160.9117348580.

The spelling of 4166421 in words is "four million, one hundred sixty-six thousand, four hundred twenty-one".