542121985 has 8 divisors (see below), whose sum is σ = 653953536. Its totient is φ = 431426160.

The previous prime is 542121953. The next prime is 542121989. The reversal of 542121985 is 589121245.

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

It is not a de Polignac number, because 542121985 - 2⁵ = 542121953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542121989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282879 + ... + 284788.

It is an arithmetic number, because the mean of its divisors is an integer number (81744192).

Almost surely, 2^542121985 is an apocalyptic number.

It is an amenable number.

542121985 is a deficient number, since it is larger than the sum of its proper divisors (111831551).

542121985 is a wasteful number, since it uses less digits than its factorization.

542121985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567863.

The product of its digits is 28800, while the sum is 37.

The square root of 542121985 is about 23283.5131584561. The cubic root of 542121985 is about 815.3905488895.

The spelling of 542121985 in words is "five hundred forty-two million, one hundred twenty-one thousand, nine hundred eighty-five".