42452221 has 8 divisors (see below), whose sum is σ = 48565440. Its totient is φ = 36351168.

The previous prime is 42452203. The next prime is 42452231. The reversal of 42452221 is 12225424.

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

It is not a de Polignac number, because 42452221 - 2⁹ = 42451709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42452192 and 42452201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42452231) 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, 6405 + ... + 11221.

It is an arithmetic number, because the mean of its divisors is an integer number (6070680).

Almost surely, 2^42452221 is an apocalyptic number.

It is an amenable number.

42452221 is a deficient number, since it is larger than the sum of its proper divisors (6113219).

42452221 is a wasteful number, since it uses less digits than its factorization.

42452221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6083.

The product of its digits is 1280, while the sum is 22.

The square root of 42452221 is about 6515.5368926897. The cubic root of 42452221 is about 348.8457787747.

Adding to 42452221 its reverse (12225424), we get a palindrome (54677645).

The spelling of 42452221 in words is "forty-two million, four hundred fifty-two thousand, two hundred twenty-one".