4213021 has 4 divisors (see below), whose sum is σ = 4228192. Its totient is φ = 4197852.

The previous prime is 4213019. The next prime is 4213031. The reversal of 4213021 is 1203124.

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 not a de Polignac number, because 4213021 - 2¹ = 4213019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4212992 and 4213010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4213031) 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, 7161 + ... + 7726.

It is an arithmetic number, because the mean of its divisors is an integer number (1057048).

Almost surely, 2^4213021 is an apocalyptic number.

It is an amenable number.

4213021 is a deficient number, since it is larger than the sum of its proper divisors (15171).

4213021 is a wasteful number, since it uses less digits than its factorization.

4213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15170.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 4213021 is about 2052.5644935056. The cubic root of 4213021 is about 161.5094263589.

Adding to 4213021 its reverse (1203124), we get a palindrome (5416145).

The spelling of 4213021 in words is "four million, two hundred thirteen thousand, twenty-one".