4670221 has 4 divisors (see below), whose sum is σ = 4746844. Its totient is φ = 4593600.

The previous prime is 4670213. The next prime is 4670227. The reversal of 4670221 is 1220764.

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 1022121 + 3648100 = 1011^2 + 1910^2 .

It is a cyclic number.

It is not a de Polignac number, because 4670221 - 2³ = 4670213 is a prime.

It is a Duffinian number.

4670221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4670192 and 4670201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4670227) 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, 38220 + ... + 38341.

It is an arithmetic number, because the mean of its divisors is an integer number (1186711).

Almost surely, 2^4670221 is an apocalyptic number.

It is an amenable number.

4670221 is a deficient number, since it is larger than the sum of its proper divisors (76623).

4670221 is an equidigital number, since it uses as much as digits as its factorization.

4670221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76622.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 4670221 is about 2161.0694111944. The cubic root of 4670221 is about 167.1523464274.

Adding to 4670221 its reverse (1220764), we get a palindrome (5890985).

The spelling of 4670221 in words is "four million, six hundred seventy thousand, two hundred twenty-one".