541421981 has 2 divisors, whose sum is σ = 541421982. Its totient is φ = 541421980.

The previous prime is 541421971. The next prime is 541421989. The reversal of 541421981 is 189124145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358496356 + 182925625 = 18934^2 + 13525^2 .

It is a cyclic number.

It is not a de Polignac number, because 541421981 - 2⁶ = 541421917 is a prime.

It is a super-2 number, since 2×541421981² = 586275523019928722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (541421989) 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, 270710990 + 270710991.

It is an arithmetic number, because the mean of its divisors is an integer number (270710991).

Almost surely, 2^541421981 is an apocalyptic number.

It is an amenable number.

541421981 is a deficient number, since it is larger than the sum of its proper divisors (1).

541421981 is an equidigital number, since it uses as much as digits as its factorization.

541421981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 35.

The square root of 541421981 is about 23268.4761211387. The cubic root of 541421981 is about 815.0394455672.

The spelling of 541421981 in words is "five hundred forty-one million, four hundred twenty-one thousand, nine hundred eighty-one".