542145021 has 32 divisors (see below), whose sum is σ = 798595200. Its totient is φ = 324430080.

The previous prime is 542145017. The next prime is 542145067. The reversal of 542145021 is 120541245.

542145021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 542145021 - 2² = 542145017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542144982 and 542145000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542145001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1393495 + ... + 1393883.

It is an arithmetic number, because the mean of its divisors is an integer number (24956100).

Almost surely, 2^542145021 is an apocalyptic number.

It is an amenable number.

542145021 is a deficient number, since it is larger than the sum of its proper divisors (256450179).

542145021 is a wasteful number, since it uses less digits than its factorization.

542145021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 542145021 is about 23284.0078379990. The cubic root of 542145021 is about 815.4020979942.

Adding to 542145021 its reverse (120541245), we get a palindrome (662686266).

The spelling of 542145021 in words is "five hundred forty-two million, one hundred forty-five thousand, twenty-one".