542987281 has 2 divisors, whose sum is σ = 542987282. Its totient is φ = 542987280.

The previous prime is 542987257. The next prime is 542987297. The reversal of 542987281 is 182789245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 466948881 + 76038400 = 21609^2 + 8720^2 .

It is a cyclic number.

It is not a de Polignac number, because 542987281 - 2²⁵ = 509432849 is a prime.

It is a super-2 number, since 2×542987281² = 589670374655545922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (542987201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271493640 + 271493641.

It is an arithmetic number, because the mean of its divisors is an integer number (271493641).

Almost surely, 2^542987281 is an apocalyptic number.

It is an amenable number.

542987281 is a deficient number, since it is larger than the sum of its proper divisors (1).

542987281 is an equidigital number, since it uses as much as digits as its factorization.

542987281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 46.

The square root of 542987281 is about 23302.0874815970. The cubic root of 542987281 is about 815.8241408040.

The spelling of 542987281 in words is "five hundred forty-two million, nine hundred eighty-seven thousand, two hundred eighty-one".