42243497 has 2 divisors, whose sum is σ = 42243498. Its totient is φ = 42243496.

The previous prime is 42243413. The next prime is 42243499. The reversal of 42243497 is 79434224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40653376 + 1590121 = 6376^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 42243497 - 2⁸ = 42243241 is a prime.

Together with 42243499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42243499) 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, 21121748 + 21121749.

It is an arithmetic number, because the mean of its divisors is an integer number (21121749).

Almost surely, 2^42243497 is an apocalyptic number.

It is an amenable number.

42243497 is a deficient number, since it is larger than the sum of its proper divisors (1).

42243497 is an equidigital number, since it uses as much as digits as its factorization.

42243497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 35.

The square root of 42243497 is about 6499.4997499808. The cubic root of 42243497 is about 348.2731181574.

The spelling of 42243497 in words is "forty-two million, two hundred forty-three thousand, four hundred ninety-seven".