542521169 has 2 divisors, whose sum is σ = 542521170. Its totient is φ = 542521168.

The previous prime is 542521103. The next prime is 542521201. The reversal of 542521169 is 961125245.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395214400 + 147306769 = 19880^2 + 12137^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542521169 is a prime.

It is a super-2 number, since 2×542521169² = 588658437626253122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (542526169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271260584 + 271260585.

It is an arithmetic number, because the mean of its divisors is an integer number (271260585).

Almost surely, 2^542521169 is an apocalyptic number.

It is an amenable number.

542521169 is a deficient number, since it is larger than the sum of its proper divisors (1).

542521169 is an equidigital number, since it uses as much as digits as its factorization.

542521169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 35.

The square root of 542521169 is about 23292.0838269142. The cubic root of 542521169 is about 815.5906336259.

The spelling of 542521169 in words is "five hundred forty-two million, five hundred twenty-one thousand, one hundred sixty-nine".