241421561 has 2 divisors, whose sum is σ = 241421562. Its totient is φ = 241421560.

The previous prime is 241421533. The next prime is 241421599. The reversal of 241421561 is 165124142.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 239289961 + 2131600 = 15469^2 + 1460^2 .

It is a cyclic number.

It is not a de Polignac number, because 241421561 - 2⁶ = 241421497 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 241421561.

It is not a weakly prime, because it can be changed into another prime (241421261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120710780 + 120710781.

It is an arithmetic number, because the mean of its divisors is an integer number (120710781).

Almost surely, 2^241421561 is an apocalyptic number.

It is an amenable number.

241421561 is a deficient number, since it is larger than the sum of its proper divisors (1).

241421561 is an equidigital number, since it uses as much as digits as its factorization.

241421561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 26.

The square root of 241421561 is about 15537.7463295035. The cubic root of 241421561 is about 622.6710645280.

The spelling of 241421561 in words is "two hundred forty-one million, four hundred twenty-one thousand, five hundred sixty-one".