42420146123 has 2 divisors, whose sum is σ = 42420146124. Its totient is φ = 42420146122.

The previous prime is 42420146107. The next prime is 42420146231. The reversal of 42420146123 is 32164102424.

Together with next prime (42420146231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42420146123 - 2⁴ = 42420146107 is a prime.

It is a super-2 number, since 2×42420146123² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42420146423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21210073061 + 21210073062.

It is an arithmetic number, because the mean of its divisors is an integer number (21210073062).

Almost surely, 2^42420146123 is an apocalyptic number.

42420146123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42420146123 is an equidigital number, since it uses as much as digits as its factorization.

42420146123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 42420146123 its reverse (32164102424), we get a palindrome (74584248547).

The spelling of 42420146123 in words is "forty-two billion, four hundred twenty million, one hundred forty-six thousand, one hundred twenty-three".