642005014123 has 12 divisors (see below), whose sum is σ = 706915210680. Its totient is φ = 582615128480.

The previous prime is 642005014087. The next prime is 642005014129. The reversal of 642005014123 is 321410500246.

It is not a de Polignac number, because 642005014123 - 2²⁵ = 641971459691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642005014091 and 642005014100.

It is not an unprimeable number, because it can be changed into a prime (642005014129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4593565 + ... + 4731262.

It is an arithmetic number, because the mean of its divisors is an integer number (58909600890).

Almost surely, 2^642005014123 is an apocalyptic number.

642005014123 is a deficient number, since it is larger than the sum of its proper divisors (64910196557).

642005014123 is a wasteful number, since it uses less digits than its factorization.

642005014123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9325418 (or 9325407 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 642005014123 its reverse (321410500246), we get a palindrome (963415514369).

The spelling of 642005014123 in words is "six hundred forty-two billion, five million, fourteen thousand, one hundred twenty-three".