642430123132 has 24 divisors (see below), whose sum is σ = 1340723736576. Its totient is φ = 263356447728.

The previous prime is 642430123123. The next prime is 642430123151. The reversal of 642430123132 is 231321034246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642430123094 and 642430123103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498780508 + ... + 498781795.

It is an arithmetic number, because the mean of its divisors is an integer number (55863489024).

Almost surely, 2^642430123132 is an apocalyptic number.

It is an amenable number.

642430123132 is an abundant number, since it is smaller than the sum of its proper divisors (698293613444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642430123132 is a wasteful number, since it uses less digits than its factorization.

642430123132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997562337 (or 997562335 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 642430123132 its reverse (231321034246), we get a palindrome (873751157378).

The spelling of 642430123132 in words is "six hundred forty-two billion, four hundred thirty million, one hundred twenty-three thousand, one hundred thirty-two".