3860221 has 2 divisors, whose sum is σ = 3860222. Its totient is φ = 3860220.

The previous prime is 3860209. The next prime is 3860231. The reversal of 3860221 is 1220683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3463321 + 396900 = 1861^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 3860221 - 2⁵ = 3860189 is a prime.

3860221 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3860192 and 3860201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3860231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1930110 + 1930111.

It is an arithmetic number, because the mean of its divisors is an integer number (1930111).

Almost surely, 2^3860221 is an apocalyptic number.

It is an amenable number.

3860221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3860221 is an equidigital number, since it uses as much as digits as its factorization.

3860221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 3860221 is about 1964.7445126530. The cubic root of 3860221 is about 156.8690945011.

The spelling of 3860221 in words is "three million, eight hundred sixty thousand, two hundred twenty-one".