542020145 has 4 divisors (see below), whose sum is σ = 650424180. Its totient is φ = 433616112.

The previous prime is 542020111. The next prime is 542020159. The reversal of 542020145 is 541020245.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541020245 = 5 ⋅108204049.

It can be written as a sum of positive squares in 2 ways, for example, as 171688609 + 370331536 = 13103^2 + 19244^2 .

It is a cyclic number.

It is not a de Polignac number, because 542020145 - 2²⁴ = 525242929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542020145.

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 in 3 ways as a sum of consecutive naturals, for example, 54202010 + ... + 54202019.

It is an arithmetic number, because the mean of its divisors is an integer number (162606045).

Almost surely, 2^542020145 is an apocalyptic number.

It is an amenable number.

542020145 is a deficient number, since it is larger than the sum of its proper divisors (108404035).

542020145 is a wasteful number, since it uses less digits than its factorization.

542020145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108404034.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 542020145 is about 23281.3261005468. The cubic root of 542020145 is about 815.3394874580.

The spelling of 542020145 in words is "five hundred forty-two million, twenty thousand, one hundred forty-five".