542205123 has 16 divisors (see below), whose sum is σ = 765968256. Its totient is φ = 339984000.

The previous prime is 542205107. The next prime is 542205133. The reversal of 542205123 is 321502245.

It is not a de Polignac number, because 542205123 - 2⁴ = 542205107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542205093 and 542205102.

It is not an unprimeable number, because it can be changed into a prime (542205133) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 112440 + ... + 117162.

It is an arithmetic number, because the mean of its divisors is an integer number (47873016).

Almost surely, 2^542205123 is an apocalyptic number.

542205123 is a deficient number, since it is larger than the sum of its proper divisors (223763133).

542205123 is a wasteful number, since it uses less digits than its factorization.

542205123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6994.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 542205123 is about 23285.2984305548. The cubic root of 542205123 is about 815.4322286075.

Adding to 542205123 its reverse (321502245), we get a palindrome (863707368).

The spelling of 542205123 in words is "five hundred forty-two million, two hundred five thousand, one hundred twenty-three".