542488861 has 2 divisors, whose sum is σ = 542488862. Its totient is φ = 542488860.

The previous prime is 542488847. The next prime is 542488873. The reversal of 542488861 is 168884245.

542488861 = 16469² + 16470².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 271260900 + 271227961 = 16470^2 + 16469^2 .

It is a cyclic number.

It is not a de Polignac number, because 542488861 - 2⁵ = 542488829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542488801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271244430 + 271244431.

It is an arithmetic number, because the mean of its divisors is an integer number (271244431).

Almost surely, 2^542488861 is an apocalyptic number.

542488861 is the 16470-th centered square number.

It is an amenable number.

542488861 is a deficient number, since it is larger than the sum of its proper divisors (1).

542488861 is an equidigital number, since it uses as much as digits as its factorization.

542488861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 491520, while the sum is 46.

The square root of 542488861 is about 23291.3902762373. The cubic root of 542488861 is about 815.5744433972.

The spelling of 542488861 in words is "five hundred forty-two million, four hundred eighty-eight thousand, eight hundred sixty-one".