642041101 has 8 divisors (see below), whose sum is σ = 701749664. Its totient is φ = 583806960.

The previous prime is 642041051. The next prime is 642041119. The reversal of 642041101 is 101140246.

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

It is a cyclic number.

It is not a de Polignac number, because 642041101 - 2⁹ = 642040589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642041201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367695 + ... + 369436.

It is an arithmetic number, because the mean of its divisors is an integer number (87718708).

Almost surely, 2^642041101 is an apocalyptic number.

It is an amenable number.

642041101 is a deficient number, since it is larger than the sum of its proper divisors (59708563).

642041101 is a wasteful number, since it uses less digits than its factorization.

642041101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737211.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 642041101 is about 25338.5299691991. The cubic root of 642041101 is about 862.6890327391.

Adding to 642041101 its reverse (101140246), we get a palindrome (743181347).

The spelling of 642041101 in words is "six hundred forty-two million, forty-one thousand, one hundred one".