84612221 has 8 divisors (see below), whose sum is σ = 86607360. Its totient is φ = 82631952.

The previous prime is 84612181. The next prime is 84612257. The reversal of 84612221 is 12221648.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84612221 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 (84612271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8240 + ... + 15398.

It is an arithmetic number, because the mean of its divisors is an integer number (10825920).

Almost surely, 2^84612221 is an apocalyptic number.

It is an amenable number.

84612221 is a deficient number, since it is larger than the sum of its proper divisors (1995139).

84612221 is a wasteful number, since it uses less digits than its factorization.

84612221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7435.

The product of its digits is 1536, while the sum is 26.

The square root of 84612221 is about 9198.4901478449. The cubic root of 84612221 is about 439.0133210985.

Adding to 84612221 its reverse (12221648), we get a palindrome (96833869).

The spelling of 84612221 in words is "eighty-four million, six hundred twelve thousand, two hundred twenty-one".