240998721 has 8 divisors (see below), whose sum is σ = 321484224. Its totient is φ = 160589520.

The previous prime is 240998711. The next prime is 240998753. The reversal of 240998721 is 127899042.

240998721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 240998721 - 2⁵ = 240998689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (240998701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11245 + ... + 24666.

It is an arithmetic number, because the mean of its divisors is an integer number (40185528).

Almost surely, 2^240998721 is an apocalyptic number.

It is an amenable number.

240998721 is a deficient number, since it is larger than the sum of its proper divisors (80485503).

240998721 is a wasteful number, since it uses less digits than its factorization.

240998721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38151.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 240998721 is about 15524.1335023891. The cubic root of 240998721 is about 622.3073244439.

The spelling of 240998721 in words is "two hundred forty million, nine hundred ninety-eight thousand, seven hundred twenty-one".