4216021 has 4 divisors (see below), whose sum is σ = 4314112. Its totient is φ = 4117932.

The previous prime is 4216007. The next prime is 4216027. The reversal of 4216021 is 1206124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4216021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4215986 and 4216004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4216027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48981 + ... + 49066.

It is an arithmetic number, because the mean of its divisors is an integer number (1078528).

Almost surely, 2^4216021 is an apocalyptic number.

It is an amenable number.

4216021 is a deficient number, since it is larger than the sum of its proper divisors (98091).

4216021 is an equidigital number, since it uses as much as digits as its factorization.

4216021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98090.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 4216021 is about 2053.2951565715. The cubic root of 4216021 is about 161.5477530384.

The spelling of 4216021 in words is "four million, two hundred sixteen thousand, twenty-one".