542420161 has 2 divisors, whose sum is σ = 542420162. Its totient is φ = 542420160.

The previous prime is 542420101. The next prime is 542420171. The reversal of 542420161 is 161024245.

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., 525280561 + 17139600 = 22919^2 + 4140^2 .

It is a cyclic number.

It is not a de Polignac number, because 542420161 - 2¹⁵ = 542387393 is a prime.

It is not a weakly prime, because it can be changed into another prime (542420101) 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, 271210080 + 271210081.

It is an arithmetic number, because the mean of its divisors is an integer number (271210081).

Almost surely, 2^542420161 is an apocalyptic number.

It is an amenable number.

542420161 is a deficient number, since it is larger than the sum of its proper divisors (1).

542420161 is an equidigital number, since it uses as much as digits as its factorization.

542420161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 542420161 is about 23289.9154356558. The cubic root of 542420161 is about 815.5400142236.

The spelling of 542420161 in words is "five hundred forty-two million, four hundred twenty thousand, one hundred sixty-one".