542065999 has 4 divisors (see below), whose sum is σ = 560757960. Its totient is φ = 523374040.

The previous prime is 542065987. The next prime is 542066003. The reversal of 542065999 is 999560245.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 542065999 - 2⁷ = 542065871 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542065919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9345937 + ... + 9345994.

It is an arithmetic number, because the mean of its divisors is an integer number (140189490).

Almost surely, 2^542065999 is an apocalyptic number.

542065999 is a deficient number, since it is larger than the sum of its proper divisors (18691961).

542065999 is a wasteful number, since it uses less digits than its factorization.

542065999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18691960.

The product of its (nonzero) digits is 874800, while the sum is 49.

The square root of 542065999 is about 23282.3108603936. The cubic root of 542065999 is about 815.3624789298.

The spelling of 542065999 in words is "five hundred forty-two million, sixty-five thousand, nine hundred ninety-nine".