642345232 has 10 divisors (see below), whose sum is σ = 1244543918. Its totient is φ = 321172608.

The previous prime is 642345181. The next prime is 642345241. The reversal of 642345232 is 232543246.

It can be written as a sum of positive squares in only one way, i.e., 642318336 + 26896 = 25344^2 + 164^2 .

It is a junction number, because it is equal to n+sod(n) for n = 642345194 and 642345203.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20073273 + ... + 20073304.

Almost surely, 2^642345232 is an apocalyptic number.

It is an amenable number.

642345232 is a deficient number, since it is larger than the sum of its proper divisors (602198686).

642345232 is a wasteful number, since it uses less digits than its factorization.

642345232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40146585 (or 40146579 counting only the distinct ones).

The product of its digits is 34560, while the sum is 31.

The square root of 642345232 is about 25344.5306131323. The cubic root of 642345232 is about 862.8252281015.

Adding to 642345232 its reverse (232543246), we get a palindrome (874888478).

The spelling of 642345232 in words is "six hundred forty-two million, three hundred forty-five thousand, two hundred thirty-two".