241868721 has 24 divisors (see below), whose sum is σ = 335567232. Its totient is φ = 154891200.

The previous prime is 241868701. The next prime is 241868749. The reversal of 241868721 is 127868142.

It is a happy number.

It is not a de Polignac number, because 241868721 - 2¹¹ = 241866673 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 241868721.

It is not an unprimeable number, because it can be changed into a prime (241868701) 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 in 23 ways as a sum of consecutive naturals, for example, 524431 + ... + 524891.

It is an arithmetic number, because the mean of its divisors is an integer number (13981968).

Almost surely, 2^241868721 is an apocalyptic number.

It is an amenable number.

241868721 is a deficient number, since it is larger than the sum of its proper divisors (93698511).

241868721 is an equidigital number, since it uses as much as digits as its factorization.

241868721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633 (or 572 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 241868721 is about 15552.1291468403. The cubic root of 241868721 is about 623.0552636639.

The spelling of 241868721 in words is "two hundred forty-one million, eight hundred sixty-eight thousand, seven hundred twenty-one".