542342021 has 16 divisors (see below), whose sum is σ = 607004160. Its totient is φ = 481118400.

The previous prime is 542341937. The next prime is 542342069. The reversal of 542342021 is 120243245.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 542342021 - 2²² = 538147717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542342621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80846 + ... + 87296.

It is an arithmetic number, because the mean of its divisors is an integer number (37937760).

Almost surely, 2^542342021 is an apocalyptic number.

It is an amenable number.

542342021 is a deficient number, since it is larger than the sum of its proper divisors (64662139).

542342021 is a wasteful number, since it uses less digits than its factorization.

542342021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6716.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 542342021 is about 23288.2378251340. The cubic root of 542342021 is about 815.5008506368.

Adding to 542342021 its reverse (120243245), we get a palindrome (662585266).

The spelling of 542342021 in words is "five hundred forty-two million, three hundred forty-two thousand, twenty-one".