6860221 has 2 divisors, whose sum is σ = 6860222. Its totient is φ = 6860220.

The previous prime is 6860213. The next prime is 6860237. The reversal of 6860221 is 1220686.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6832996 + 27225 = 2614^2 + 165^2 .

It is a cyclic number.

It is not a de Polignac number, because 6860221 - 2³ = 6860213 is a prime.

6860221 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6860251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3430110 + 3430111.

It is an arithmetic number, because the mean of its divisors is an integer number (3430111).

Almost surely, 2^6860221 is an apocalyptic number.

It is an amenable number.

6860221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6860221 is an equidigital number, since it uses as much as digits as its factorization.

6860221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 6860221 is about 2619.2023594980. The cubic root of 6860221 is about 190.0112735693.

The spelling of 6860221 in words is "six million, eight hundred sixty thousand, two hundred twenty-one".