642125330143 has 4 divisors (see below), whose sum is σ = 700500360168. Its totient is φ = 583750300120.

The previous prime is 642125330141. The next prime is 642125330201. The reversal of 642125330143 is 341033521246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 642125330143 - 2¹ = 642125330141 is a prime.

It is a super-2 number, since 2×642125330143² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 642125330099 and 642125330108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642125330141) 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 3 ways as a sum of consecutive naturals, for example, 29187514996 + ... + 29187515017.

It is an arithmetic number, because the mean of its divisors is an integer number (175125090042).

Almost surely, 2^642125330143 is an apocalyptic number.

642125330143 is a deficient number, since it is larger than the sum of its proper divisors (58375030025).

642125330143 is a wasteful number, since it uses less digits than its factorization.

642125330143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58375030024.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 642125330143 its reverse (341033521246), we get a palindrome (983158851389).

The spelling of 642125330143 in words is "six hundred forty-two billion, one hundred twenty-five million, three hundred thirty thousand, one hundred forty-three".