42324521 has 2 divisors, whose sum is σ = 42324522. Its totient is φ = 42324520.

The previous prime is 42324511. The next prime is 42324551. The reversal of 42324521 is 12542324.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34058896 + 8265625 = 5836^2 + 2875^2 .

It is a cyclic number.

It is not a de Polignac number, because 42324521 - 2¹⁴ = 42308137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42324511) 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 as a sum of consecutive naturals, namely, 21162260 + 21162261.

It is an arithmetic number, because the mean of its divisors is an integer number (21162261).

Almost surely, 2^42324521 is an apocalyptic number.

It is an amenable number.

42324521 is a deficient number, since it is larger than the sum of its proper divisors (1).

42324521 is an equidigital number, since it uses as much as digits as its factorization.

42324521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 23.

The square root of 42324521 is about 6505.7298591319. The cubic root of 42324521 is about 348.4956412366.

Adding to 42324521 its reverse (12542324), we get a palindrome (54866845).

The spelling of 42324521 in words is "forty-two million, three hundred twenty-four thousand, five hundred twenty-one".