42343121 has 8 divisors (see below), whose sum is σ = 42873600. Its totient is φ = 41815440.

The previous prime is 42343111. The next prime is 42343157. The reversal of 42343121 is 12134324.

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

It is a cyclic number.

It is not a de Polignac number, because 42343121 - 2¹⁸ = 42080977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42343093 and 42343102.

It is not an unprimeable number, because it can be changed into a prime (42343111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51806 + ... + 52616.

It is an arithmetic number, because the mean of its divisors is an integer number (5359200).

Almost surely, 2^42343121 is an apocalyptic number.

It is an amenable number.

42343121 is a deficient number, since it is larger than the sum of its proper divisors (530479).

42343121 is a wasteful number, since it uses less digits than its factorization.

42343121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399.

The product of its digits is 576, while the sum is 20.

The square root of 42343121 is about 6507.1592112073. The cubic root of 42343121 is about 348.5466839062.

Adding to 42343121 its reverse (12134324), we get a palindrome (54477445).

The spelling of 42343121 in words is "forty-two million, three hundred forty-three thousand, one hundred twenty-one".