4241221 has 4 divisors (see below), whose sum is σ = 4387500. Its totient is φ = 4094944.

The previous prime is 4241207. The next prime is 4241239. The reversal of 4241221 is 1221424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3290596 + 950625 = 1814^2 + 975^2 .

It is a cyclic number.

It is not a de Polignac number, because 4241221 - 2⁵ = 4241189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4241195 and 4241204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4241201) 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, 73096 + ... + 73153.

It is an arithmetic number, because the mean of its divisors is an integer number (1096875).

Almost surely, 2^4241221 is an apocalyptic number.

It is an amenable number.

4241221 is a deficient number, since it is larger than the sum of its proper divisors (146279).

4241221 is a wasteful number, since it uses less digits than its factorization.

4241221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146278.

The product of its digits is 128, while the sum is 16.

The square root of 4241221 is about 2059.4224918651. The cubic root of 4241221 is about 161.8689816042.

Adding to 4241221 its reverse (1221424), we get a palindrome (5462645).

The spelling of 4241221 in words is "four million, two hundred forty-one thousand, two hundred twenty-one".