4221013 has 4 divisors (see below), whose sum is σ = 4251520. Its totient is φ = 4190508.

The previous prime is 4221011. The next prime is 4221031. The reversal of 4221013 is 3101224.

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 4221013 - 2¹ = 4221011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4220984 and 4221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221011) 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, 15045 + ... + 15322.

It is an arithmetic number, because the mean of its divisors is an integer number (1062880).

Almost surely, 2^4221013 is an apocalyptic number.

It is an amenable number.

4221013 is a deficient number, since it is larger than the sum of its proper divisors (30507).

4221013 is a wasteful number, since it uses less digits than its factorization.

4221013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30506.

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

The square root of 4221013 is about 2054.5104039649. The cubic root of 4221013 is about 161.6114883551.

Subtracting from 4221013 its product of nonzero digits (48), we obtain a triangular number (4220965 = T₂₉₀₅).

Adding to 4221013 its reverse (3101224), we get a palindrome (7322237).

The spelling of 4221013 in words is "four million, two hundred twenty-one thousand, thirteen".