542450125121 has 4 divisors (see below), whose sum is σ = 542452155732. Its totient is φ = 542448094512.

The previous prime is 542450125109. The next prime is 542450125163. The reversal of 542450125121 is 121521054245.

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

It can be written as a sum of positive squares in 2 ways, for example, as 318281018896 + 224169106225 = 564164^2 + 473465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542450125121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542450125621) 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, 540626 + ... + 1173531.

It is an arithmetic number, because the mean of its divisors is an integer number (135613038933).

Almost surely, 2^542450125121 is an apocalyptic number.

It is an amenable number.

542450125121 is a deficient number, since it is larger than the sum of its proper divisors (2030611).

542450125121 is a wasteful number, since it uses less digits than its factorization.

542450125121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030610.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 542450125121 its reverse (121521054245), we get a palindrome (663971179366).

The spelling of 542450125121 in words is "five hundred forty-two billion, four hundred fifty million, one hundred twenty-five thousand, one hundred twenty-one".