642331142 has 8 divisors (see below), whose sum is σ = 967528800. Its totient is φ = 319821544.

The previous prime is 642331141. The next prime is 642331147. The reversal of 642331142 is 241133246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642331141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671417 + ... + 672372.

It is an arithmetic number, because the mean of its divisors is an integer number (120941100).

Almost surely, 2^642331142 is an apocalyptic number.

642331142 is a deficient number, since it is larger than the sum of its proper divisors (325197658).

642331142 is a wasteful number, since it uses less digits than its factorization.

642331142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344030.

The product of its digits is 3456, while the sum is 26.

The square root of 642331142 is about 25344.2526423645. The cubic root of 642331142 is about 862.8189192945.

Adding to 642331142 its reverse (241133246), we get a palindrome (883464388).

The spelling of 642331142 in words is "six hundred forty-two million, three hundred thirty-one thousand, one hundred forty-two".