6091221 has 8 divisors (see below), whose sum is σ = 8383744. Its totient is φ = 3929760.

The previous prime is 6091213. The next prime is 6091223. The reversal of 6091221 is 1221906.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6091221 - 2³ = 6091213 is a prime.

It is a Duffinian number.

6091221 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6091223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32656 + ... + 32841.

It is an arithmetic number, because the mean of its divisors is an integer number (1047968).

Almost surely, 2^6091221 is an apocalyptic number.

It is an amenable number.

6091221 is a deficient number, since it is larger than the sum of its proper divisors (2292523).

6091221 is a wasteful number, since it uses less digits than its factorization.

6091221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65531.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 6091221 is about 2468.0399105363. The cubic root of 6091221 is about 182.6283178387.

It can be divided in two parts, 609 and 1221, that added together give a triangular number (1830 = T₆₀).

The spelling of 6091221 in words is "six million, ninety-one thousand, two hundred twenty-one".