542042101 has 2 divisors, whose sum is σ = 542042102. Its totient is φ = 542042100.

The previous prime is 542042063. The next prime is 542042141. The reversal of 542042101 is 101240245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410022001 + 132020100 = 20249^2 + 11490^2 .

It is a cyclic number.

It is not a de Polignac number, because 542042101 - 2¹³ = 542033909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542042141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271021050 + 271021051.

It is an arithmetic number, because the mean of its divisors is an integer number (271021051).

Almost surely, 2^542042101 is an apocalyptic number.

It is an amenable number.

542042101 is a deficient number, since it is larger than the sum of its proper divisors (1).

542042101 is an equidigital number, since it uses as much as digits as its factorization.

542042101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 542042101 is about 23281.7976324853. The cubic root of 542042101 is about 815.3504964904.

Adding to 542042101 its reverse (101240245), we get a palindrome (643282346).

The spelling of 542042101 in words is "five hundred forty-two million, forty-two thousand, one hundred one".