541252561 has 2 divisors, whose sum is σ = 541252562. Its totient is φ = 541252560.

The previous prime is 541252559. The next prime is 541252577. The reversal of 541252561 is 165252145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284259600 + 256992961 = 16860^2 + 16031^2 .

It is a cyclic number.

It is not a de Polignac number, because 541252561 - 2¹ = 541252559 is a prime.

Together with 541252559, it forms a pair of twin primes.

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

It is not a weakly prime, because it can be changed into another prime (541252541) 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, 270626280 + 270626281.

It is an arithmetic number, because the mean of its divisors is an integer number (270626281).

Almost surely, 2^541252561 is an apocalyptic number.

It is an amenable number.

541252561 is a deficient number, since it is larger than the sum of its proper divisors (1).

541252561 is an equidigital number, since it uses as much as digits as its factorization.

541252561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

The square root of 541252561 is about 23264.8352884778. The cubic root of 541252561 is about 814.9544235369.

The spelling of 541252561 in words is "five hundred forty-one million, two hundred fifty-two thousand, five hundred sixty-one".