42356123 has 2 divisors, whose sum is σ = 42356124. Its totient is φ = 42356122.

The previous prime is 42356113. The next prime is 42356173. The reversal of 42356123 is 32165324.

42356123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42356123 - 2⁴ = 42356107 is a prime.

It is a super-2 number, since 2×42356123² = 3588082311182258, which contains 22 as substring.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 42356092 and 42356101.

It is not a weakly prime, because it can be changed into another prime (42356113) 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, 21178061 + 21178062.

It is an arithmetic number, because the mean of its divisors is an integer number (21178062).

Almost surely, 2^42356123 is an apocalyptic number.

42356123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42356123 is an equidigital number, since it uses as much as digits as its factorization.

42356123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 26.

The square root of 42356123 is about 6508.1581879976. The cubic root of 42356123 is about 348.5823555030.

The spelling of 42356123 in words is "forty-two million, three hundred fifty-six thousand, one hundred twenty-three".