42130221 has 8 divisors (see below), whose sum is σ = 64198464. Its totient is φ = 24074400.

The previous prime is 42130213. The next prime is 42130241. The reversal of 42130221 is 12203124.

42130221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 42130221 - 2³ = 42130213 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42130221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42130211) 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, 1003080 + ... + 1003121.

It is an arithmetic number, because the mean of its divisors is an integer number (8024808).

Almost surely, 2^42130221 is an apocalyptic number.

It is an amenable number.

42130221 is a deficient number, since it is larger than the sum of its proper divisors (22068243).

42130221 is a wasteful number, since it uses less digits than its factorization.

42130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006211.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 42130221 is about 6490.7796912235. The cubic root of 42130221 is about 347.9615411985.

Adding to 42130221 its reverse (12203124), we get a palindrome (54333345).

The spelling of 42130221 in words is "forty-two million, one hundred thirty thousand, two hundred twenty-one".