542281 has 2 divisors, whose sum is σ = 542282. Its totient is φ = 542280.

The previous prime is 542263. The next prime is 542293. The reversal of 542281 is 182245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308025 + 234256 = 555^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 542281 - 2⁷ = 542153 is a prime.

It is a super-2 number, since 2×542281² = 588137365922, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (542251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271140 + 271141.

It is an arithmetic number, because the mean of its divisors is an integer number (271141).

2⁵⁴²²⁸¹ is an apocalyptic number.

It is an amenable number.

542281 is a deficient number, since it is larger than the sum of its proper divisors (1).

542281 is an equidigital number, since it uses as much as digits as its factorization.

542281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 22.

The square root of 542281 is about 736.3973112390. The cubic root of 542281 is about 81.5470264437.

The spelling of 542281 in words is "five hundred forty-two thousand, two hundred eighty-one".