4146221 has 2 divisors, whose sum is σ = 4146222. Its totient is φ = 4146220.

The previous prime is 4146211. The next prime is 4146227. The reversal of 4146221 is 1226414.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3290596 + 855625 = 1814^2 + 925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4146221 is a prime.

It is a super-2 number, since 2×4146221² = 34382297161682, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4146193 and 4146202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4146227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2073110 + 2073111.

It is an arithmetic number, because the mean of its divisors is an integer number (2073111).

Almost surely, 2^4146221 is an apocalyptic number.

It is an amenable number.

4146221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4146221 is an equidigital number, since it uses as much as digits as its factorization.

4146221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 20.

The square root of 4146221 is about 2036.2271484292. The cubic root of 4146221 is about 160.6512647629.

The spelling of 4146221 in words is "four million, one hundred forty-six thousand, two hundred twenty-one".