541340021 has 2 divisors, whose sum is σ = 541340022. Its totient is φ = 541340020.

The previous prime is 541339999. The next prime is 541340053. The reversal of 541340021 is 120043145.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 371949796 + 169390225 = 19286^2 + 13015^2 .

It is a cyclic number.

It is not a de Polignac number, because 541340021 - 2⁶ = 541339957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 541339975 and 541340002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541340621) 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, 270670010 + 270670011.

It is an arithmetic number, because the mean of its divisors is an integer number (270670011).

Almost surely, 2^541340021 is an apocalyptic number.

It is an amenable number.

541340021 is a deficient number, since it is larger than the sum of its proper divisors (1).

541340021 is an equidigital number, since it uses as much as digits as its factorization.

541340021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 541340021 is about 23266.7148733980. The cubic root of 541340021 is about 814.9983168319.

Adding to 541340021 its reverse (120043145), we get a palindrome (661383166).

The spelling of 541340021 in words is "five hundred forty-one million, three hundred forty thousand, twenty-one".