642141782 has 8 divisors (see below), whose sum is σ = 1019872296. Its totient is φ = 302184352.

The previous prime is 642141779. The next prime is 642141793. The reversal of 642141782 is 287141246.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9443228 + ... + 9443295.

It is an arithmetic number, because the mean of its divisors is an integer number (127484037).

Almost surely, 2^642141782 is an apocalyptic number.

642141782 is a deficient number, since it is larger than the sum of its proper divisors (377730514).

642141782 is a wasteful number, since it uses less digits than its factorization.

642141782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18886542.

The product of its digits is 21504, while the sum is 35.

The square root of 642141782 is about 25340.5166087829. The cubic root of 642141782 is about 862.7341242733.

The spelling of 642141782 in words is "six hundred forty-two million, one hundred forty-one thousand, seven hundred eighty-two".