7986221 has 4 divisors (see below), whose sum is σ = 8333472. Its totient is φ = 7638972.

The previous prime is 7986217. The next prime is 7986229. The reversal of 7986221 is 1226897.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7986221 - 2² = 7986217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7986229) 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, 173591 + ... + 173636.

It is an arithmetic number, because the mean of its divisors is an integer number (2083368).

Almost surely, 2^7986221 is an apocalyptic number.

It is an amenable number.

7986221 is a deficient number, since it is larger than the sum of its proper divisors (347251).

7986221 is a wasteful number, since it uses less digits than its factorization.

7986221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347250.

The product of its digits is 12096, while the sum is 35.

The square root of 7986221 is about 2825.9902689146. The cubic root of 7986221 is about 199.8851090129.

The spelling of 7986221 in words is "seven million, nine hundred eighty-six thousand, two hundred twenty-one".