4221015 has 16 divisors (see below), whose sum is σ = 7151328. Its totient is φ = 2118656.

The previous prime is 4221011. The next prime is 4221031. The reversal of 4221015 is 5101224.

It is a cyclic number.

It is not a de Polignac number, because 4221015 - 2² = 4221011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 4220985 and 4221003.

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 15 ways as a sum of consecutive naturals, for example, 8022 + ... + 8531.

It is an arithmetic number, because the mean of its divisors is an integer number (446958).

Almost surely, 2^4221015 is an apocalyptic number.

4221015 is a deficient number, since it is larger than the sum of its proper divisors (2930313).

4221015 is a wasteful number, since it uses less digits than its factorization.

4221015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16578.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 4221015 is about 2054.5108906988. The cubic root of 4221015 is about 161.6115138800.

Adding to 4221015 its reverse (5101224), we get a palindrome (9322239).

The spelling of 4221015 in words is "four million, two hundred twenty-one thousand, fifteen".