4216421 has 8 divisors (see below), whose sum is σ = 4614624. Its totient is φ = 3820720.

The previous prime is 4216411. The next prime is 4216439. The reversal of 4216421 is 1246124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4216421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4216393 and 4216402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4216411) 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, 6131 + ... + 6783.

It is an arithmetic number, because the mean of its divisors is an integer number (576828).

Almost surely, 2^4216421 is an apocalyptic number.

It is an amenable number.

4216421 is a deficient number, since it is larger than the sum of its proper divisors (398203).

4216421 is a wasteful number, since it uses less digits than its factorization.

4216421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1251.

The product of its digits is 384, while the sum is 20.

The square root of 4216421 is about 2053.3925586697. The cubic root of 4216421 is about 161.5528618885.

The spelling of 4216421 in words is "four million, two hundred sixteen thousand, four hundred twenty-one".