42424931 has 2 divisors, whose sum is σ = 42424932. Its totient is φ = 42424930.

The previous prime is 42424913. The next prime is 42424933. The reversal of 42424931 is 13942424.

42424931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (42424913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42424931 - 2⁶ = 42424867 is a prime.

It is a super-2 number, since 2×42424931² = 3599749540709522, which contains 22 as substring.

Together with 42424933, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 42424894 and 42424903.

It is not a weakly prime, because it can be changed into another prime (42424933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21212465 + 21212466.

It is an arithmetic number, because the mean of its divisors is an integer number (21212466).

Almost surely, 2^42424931 is an apocalyptic number.

42424931 is a deficient number, since it is larger than the sum of its proper divisors (1).

42424931 is an equidigital number, since it uses as much as digits as its factorization.

42424931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 29.

The square root of 42424931 is about 6513.4423310566. The cubic root of 42424931 is about 348.7710120389.

The spelling of 42424931 in words is "forty-two million, four hundred twenty-four thousand, nine hundred thirty-one".