241561591 has 2 divisors, whose sum is σ = 241561592. Its totient is φ = 241561590.

The previous prime is 241561559. The next prime is 241561601. The reversal of 241561591 is 195165142.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 241561591 - 2⁵ = 241561559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241561531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120780795 + 120780796.

It is an arithmetic number, because the mean of its divisors is an integer number (120780796).

Almost surely, 2^241561591 is an apocalyptic number.

241561591 is a deficient number, since it is larger than the sum of its proper divisors (1).

241561591 is an equidigital number, since it uses as much as digits as its factorization.

241561591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 241561591 is about 15542.2517995302. The cubic root of 241561591 is about 622.7914290559.

The spelling of 241561591 in words is "two hundred forty-one million, five hundred sixty-one thousand, five hundred ninety-one".