42321121 has 8 divisors (see below), whose sum is σ = 44217000. Its totient is φ = 40454400.

The previous prime is 42321101. The next prime is 42321133. The reversal of 42321121 is 12112324.

It can be written as a sum of positive squares in 4 ways, for example, as 31192225 + 11128896 = 5585^2 + 3336^2 .

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 42321121 - 2⁵ = 42321089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42321095 and 42321104.

It is not an unprimeable number, because it can be changed into a prime (42321101) 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, 4296 + ... + 10153.

It is an arithmetic number, because the mean of its divisors is an integer number (5527125).

Almost surely, 2^42321121 is an apocalyptic number.

It is an amenable number.

42321121 is a deficient number, since it is larger than the sum of its proper divisors (1895879).

42321121 is a wasteful number, since it uses less digits than its factorization.

42321121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14579.

The product of its digits is 96, while the sum is 16.

The square root of 42321121 is about 6505.4685457698. The cubic root of 42321121 is about 348.4863092396.

Adding to 42321121 its reverse (12112324), we get a palindrome (54433445).

The spelling of 42321121 in words is "forty-two million, three hundred twenty-one thousand, one hundred twenty-one".