541278581 has 2 divisors, whose sum is σ = 541278582. Its totient is φ = 541278580.

The previous prime is 541278557. The next prime is 541278583. The reversal of 541278581 is 185872145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 477422500 + 63856081 = 21850^2 + 7991^2 .

It is a cyclic number.

It is not a de Polignac number, because 541278581 - 2²² = 537084277 is a prime.

It is a super-2 number, since 2×541278581² = 585965004498747122, which contains 22 as substring.

Together with 541278583, it forms a pair of twin primes.

It is a Chen prime.

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 (541278583) 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, 270639290 + 270639291.

It is an arithmetic number, because the mean of its divisors is an integer number (270639291).

Almost surely, 2^541278581 is an apocalyptic number.

It is an amenable number.

541278581 is a deficient number, since it is larger than the sum of its proper divisors (1).

541278581 is an equidigital number, since it uses as much as digits as its factorization.

541278581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 89600, while the sum is 41.

The square root of 541278581 is about 23265.3944948286. The cubic root of 541278581 is about 814.9674826124.

The spelling of 541278581 in words is "five hundred forty-one million, two hundred seventy-eight thousand, five hundred eighty-one".