7884221 has 4 divisors (see below), whose sum is σ = 8299200. Its totient is φ = 7469244.

The previous prime is 7884197. The next prime is 7884223. The reversal of 7884221 is 1224887.

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 7884221 - 2¹⁴ = 7867837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7884223) 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, 207461 + ... + 207498.

It is an arithmetic number, because the mean of its divisors is an integer number (2074800).

Almost surely, 2^7884221 is an apocalyptic number.

It is an amenable number.

7884221 is a deficient number, since it is larger than the sum of its proper divisors (414979).

7884221 is a wasteful number, since it uses less digits than its factorization.

7884221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414978.

The product of its digits is 7168, while the sum is 32.

The square root of 7884221 is about 2807.8855033637. The cubic root of 7884221 is about 199.0304827760.

The spelling of 7884221 in words is "seven million, eight hundred eighty-four thousand, two hundred twenty-one".