42324281 has 2 divisors, whose sum is σ = 42324282. Its totient is φ = 42324280.

The previous prime is 42324251. The next prime is 42324283. The reversal of 42324281 is 18242324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 2128681 = 6340^2 + 1459^2 .

It is a cyclic number.

It is not a de Polignac number, because 42324281 - 2¹⁰ = 42323257 is a prime.

It is a super-2 number, since 2×42324281² = 3582689524333922, which contains 22 as substring.

Together with 42324283, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42324281.

It is not a weakly prime, because it can be changed into another prime (42324283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21162140 + 21162141.

It is an arithmetic number, because the mean of its divisors is an integer number (21162141).

Almost surely, 2^42324281 is an apocalyptic number.

It is an amenable number.

42324281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42324281 is an equidigital number, since it uses as much as digits as its factorization.

42324281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 26.

The square root of 42324281 is about 6505.7114138271. The cubic root of 42324281 is about 348.4949825238.

The spelling of 42324281 in words is "forty-two million, three hundred twenty-four thousand, two hundred eighty-one".