42224121 has 6 divisors (see below), whose sum is σ = 60990410. Its totient is φ = 28149408.

The previous prime is 42224111. The next prime is 42224167. The reversal of 42224121 is 12142224.

42224121 is a `hidden beast` number, since 422 + 241 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38303721 + 3920400 = 6189^2 + 1980^2 .

It is not a de Polignac number, because 42224121 - 2⁶ = 42224057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42224094 and 42224103.

It is not an unprimeable number, because it can be changed into a prime (42224101) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2345776 + ... + 2345793.

Almost surely, 2^42224121 is an apocalyptic number.

It is an amenable number.

42224121 is a deficient number, since it is larger than the sum of its proper divisors (18766289).

42224121 is a wasteful number, since it uses less digits than its factorization.

42224121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4691575 (or 4691572 counting only the distinct ones).

The product of its digits is 256, while the sum is 18.

The square root of 42224121 is about 6498.0090027638. The cubic root of 42224121 is about 348.2198620555.

Adding to 42224121 its reverse (12142224), we get a palindrome (54366345).

The spelling of 42224121 in words is "forty-two million, two hundred twenty-four thousand, one hundred twenty-one".