542055021 has 8 divisors (see below), whose sum is σ = 723537024. Its totient is φ = 360971520.

The previous prime is 542054993. The next prime is 542055043. The reversal of 542055021 is 120550245.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 542055021 - 2⁶ = 542054957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 542054982 and 542055000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542055061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96436 + ... + 101901.

It is an arithmetic number, because the mean of its divisors is an integer number (90442128).

Almost surely, 2^542055021 is an apocalyptic number.

It is an amenable number.

542055021 is a deficient number, since it is larger than the sum of its proper divisors (181482003).

542055021 is a wasteful number, since it uses less digits than its factorization.

542055021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199251.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 542055021 is about 23282.0751008152. The cubic root of 542055021 is about 815.3569746125.

The spelling of 542055021 in words is "five hundred forty-two million, fifty-five thousand, twenty-one".