542525261 has 2 divisors, whose sum is σ = 542525262. Its totient is φ = 542525260.

The previous prime is 542525239. The next prime is 542525273. The reversal of 542525261 is 162525245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 528724036 + 13801225 = 22994^2 + 3715^2 .

It is a cyclic number.

It is not a de Polignac number, because 542525261 - 2²⁶ = 475416397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542525231) 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, 271262630 + 271262631.

It is an arithmetic number, because the mean of its divisors is an integer number (271262631).

Almost surely, 2^542525261 is an apocalyptic number.

It is an amenable number.

542525261 is a deficient number, since it is larger than the sum of its proper divisors (1).

542525261 is an equidigital number, since it uses as much as digits as its factorization.

542525261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24000, while the sum is 32.

The square root of 542525261 is about 23292.1716677514. The cubic root of 542525261 is about 815.5926841686.

The spelling of 542525261 in words is "five hundred forty-two million, five hundred twenty-five thousand, two hundred sixty-one".