241680821 has 2 divisors, whose sum is σ = 241680822. Its totient is φ = 241680820.

The previous prime is 241680787. The next prime is 241680839. The reversal of 241680821 is 128086142.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 185640625 + 56040196 = 13625^2 + 7486^2 .

It is a cyclic number.

It is not a de Polignac number, because 241680821 - 2¹⁸ = 241418677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (241680871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120840410 + 120840411.

It is an arithmetic number, because the mean of its divisors is an integer number (120840411).

Almost surely, 2^241680821 is an apocalyptic number.

It is an amenable number.

241680821 is a deficient number, since it is larger than the sum of its proper divisors (1).

241680821 is an equidigital number, since it uses as much as digits as its factorization.

241680821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 241680821 is about 15546.0869996279. The cubic root of 241680821 is about 622.8938780257.

The spelling of 241680821 in words is "two hundred forty-one million, six hundred eighty thousand, eight hundred twenty-one".