240204021 has 8 divisors (see below), whose sum is σ = 320417664. Its totient is φ = 160063200.

The previous prime is 240204011. The next prime is 240204043. The reversal of 240204021 is 120402042.

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

It is not a de Polignac number, because 240204021 - 2⁵ = 240203989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240204001) 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, 9976 + ... + 24081.

It is an arithmetic number, because the mean of its divisors is an integer number (40052208).

Almost surely, 2^240204021 is an apocalyptic number.

It is an amenable number.

240204021 is a deficient number, since it is larger than the sum of its proper divisors (80213643).

240204021 is a wasteful number, since it uses less digits than its factorization.

240204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36411.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 240204021 is about 15498.5167354815. The cubic root of 240204021 is about 621.6225459499.

Adding to 240204021 its reverse (120402042), we get a palindrome (360606063).

The spelling of 240204021 in words is "two hundred forty million, two hundred four thousand, twenty-one".