542638441 has 2 divisors, whose sum is σ = 542638442. Its totient is φ = 542638440.

The previous prime is 542638417. The next prime is 542638451. The reversal of 542638441 is 144836245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347449600 + 195188841 = 18640^2 + 13971^2 .

It is a cyclic number.

It is not a de Polignac number, because 542638441 - 2¹⁷ = 542507369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542638441.

It is not a weakly prime, because it can be changed into another prime (542638451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271319220 + 271319221.

It is an arithmetic number, because the mean of its divisors is an integer number (271319221).

Almost surely, 2^542638441 is an apocalyptic number.

It is an amenable number.

542638441 is a deficient number, since it is larger than the sum of its proper divisors (1).

542638441 is an equidigital number, since it uses as much as digits as its factorization.

542638441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 37.

The square root of 542638441 is about 23294.6011127042. The cubic root of 542638441 is about 815.6493957286.

The spelling of 542638441 in words is "five hundred forty-two million, six hundred thirty-eight thousand, four hundred forty-one".