642035101 has 2 divisors, whose sum is σ = 642035102. Its totient is φ = 642035100.

The previous prime is 642035081. The next prime is 642035111. The reversal of 642035101 is 101530246.

642035101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 462207001 + 179828100 = 21499^2 + 13410^2 .

It is a cyclic number.

It is not a de Polignac number, because 642035101 - 2¹¹ = 642033053 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (642035111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321017550 + 321017551.

It is an arithmetic number, because the mean of its divisors is an integer number (321017551).

Almost surely, 2^642035101 is an apocalyptic number.

It is an amenable number.

642035101 is a deficient number, since it is larger than the sum of its proper divisors (1).

642035101 is an equidigital number, since it uses as much as digits as its factorization.

642035101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 642035101 is about 25338.4115721566. The cubic root of 642035101 is about 862.6863453980.

Adding to 642035101 its reverse (101530246), we get a palindrome (743565347).

The spelling of 642035101 in words is "six hundred forty-two million, thirty-five thousand, one hundred one".