42424387 has 2 divisors, whose sum is σ = 42424388. Its totient is φ = 42424386.

The previous prime is 42424373. The next prime is 42424411. The reversal of 42424387 is 78342424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42424387 - 2¹¹ = 42422339 is a prime.

It is a super-2 number, since 2×42424387² = 3599657224651538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42424357) 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, 21212193 + 21212194.

It is an arithmetic number, because the mean of its divisors is an integer number (21212194).

Almost surely, 2^42424387 is an apocalyptic number.

42424387 is a deficient number, since it is larger than the sum of its proper divisors (1).

42424387 is an equidigital number, since it uses as much as digits as its factorization.

42424387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 34.

The square root of 42424387 is about 6513.4005711303. The cubic root of 42424387 is about 348.7695213098.

The spelling of 42424387 in words is "forty-two million, four hundred twenty-four thousand, three hundred eighty-seven".