8422121 has 8 divisors (see below), whose sum is σ = 8553600. Its totient is φ = 8291920.

The previous prime is 8422079. The next prime is 8422133. The reversal of 8422121 is 1212248.

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-8422121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8422093 and 8422102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8422181) 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, 31175 + ... + 31443.

It is an arithmetic number, because the mean of its divisors is an integer number (1069200).

Almost surely, 2^8422121 is an apocalyptic number.

It is an amenable number.

8422121 is a deficient number, since it is larger than the sum of its proper divisors (131479).

8422121 is a wasteful number, since it uses less digits than its factorization.

8422121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639.

The product of its digits is 256, while the sum is 20.

The square root of 8422121 is about 2902.0890751319. The cubic root of 8422121 is about 203.4575570459.

Adding to 8422121 its reverse (1212248), we get a palindrome (9634369).

The spelling of 8422121 in words is "eight million, four hundred twenty-two thousand, one hundred twenty-one".