541278781 has 2 divisors, whose sum is σ = 541278782. Its totient is φ = 541278780.

The previous prime is 541278763. The next prime is 541278799. The reversal of 541278781 is 187872145.

It is a balanced prime because it is at equal distance from previous prime (541278763) and next prime (541278799).

It can be written as a sum of positive squares in only one way, i.e., 464014681 + 77264100 = 21541^2 + 8790^2 .

It is a cyclic number.

It is not a de Polignac number, because 541278781 - 2¹³ = 541270589 is a prime.

It is a super-2 number, since 2×541278781² = 585965437521691922, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541278581) 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, 270639390 + 270639391.

It is an arithmetic number, because the mean of its divisors is an integer number (270639391).

Almost surely, 2^541278781 is an apocalyptic number.

It is an amenable number.

541278781 is a deficient number, since it is larger than the sum of its proper divisors (1).

541278781 is an equidigital number, since it uses as much as digits as its factorization.

541278781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 125440, while the sum is 43.

The square root of 541278781 is about 23265.3987930575. The cubic root of 541278781 is about 814.9675829880.

The spelling of 541278781 in words is "five hundred forty-one million, two hundred seventy-eight thousand, seven hundred eighty-one".