300240021 has 16 divisors (see below), whose sum is σ = 408806784. Its totient is φ = 195957504.

The previous prime is 300240001. The next prime is 300240029. The reversal of 300240021 is 120042003.

It is not a de Polignac number, because 300240021 - 2⁹ = 300239509 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 300239979 and 300240006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (300240029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25000 + ... + 35006.

It is an arithmetic number, because the mean of its divisors is an integer number (25550424).

Almost surely, 2^300240021 is an apocalyptic number.

It is an amenable number.

300240021 is a deficient number, since it is larger than the sum of its proper divisors (108566763).

300240021 is a wasteful number, since it uses less digits than its factorization.

300240021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10220.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 300240021 is about 17327.4354998078. The cubic root of 300240021 is about 669.6114335643.

Adding to 300240021 its reverse (120042003), we get a palindrome (420282024).

The spelling of 300240021 in words is "three hundred million, two hundred forty thousand, twenty-one".