42424517 has 2 divisors, whose sum is σ = 42424518. Its totient is φ = 42424516.

The previous prime is 42424483. The next prime is 42424519. The reversal of 42424517 is 71542424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34409956 + 8014561 = 5866^2 + 2831^2 .

It is a cyclic number.

It is not a de Polignac number, because 42424517 - 2⁶ = 42424453 is a prime.

Together with 42424519, 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 42424517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42424519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21212258 + 21212259.

It is an arithmetic number, because the mean of its divisors is an integer number (21212259).

Almost surely, 2^42424517 is an apocalyptic number.

It is an amenable number.

42424517 is a deficient number, since it is larger than the sum of its proper divisors (1).

42424517 is an equidigital number, since it uses as much as digits as its factorization.

42424517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8960, while the sum is 29.

The square root of 42424517 is about 6513.4105505488. The cubic root of 42424517 is about 348.7698775514.

The spelling of 42424517 in words is "forty-two million, four hundred twenty-four thousand, five hundred seventeen".