304112021 has 8 divisors (see below), whose sum is σ = 308243160. Its totient is φ = 299996928.

The previous prime is 304111987. The next prime is 304112033. The reversal of 304112021 is 120211403.

It can be written as a sum of positive squares in 4 ways, for example, as 132135025 + 171976996 = 11495^2 + 13114^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-304112021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 304111987 and 304112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304712021) 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, 36935 + ... + 44411.

It is an arithmetic number, because the mean of its divisors is an integer number (38530395).

Almost surely, 2^304112021 is an apocalyptic number.

It is an amenable number.

304112021 is a deficient number, since it is larger than the sum of its proper divisors (4131139).

304112021 is an equidigital number, since it uses as much as digits as its factorization.

304112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8023.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 304112021 is about 17438.8079007712. The cubic root of 304112021 is about 672.4776615346.

Adding to 304112021 its reverse (120211403), we get a palindrome (424323424).

The spelling of 304112021 in words is "three hundred four million, one hundred twelve thousand, twenty-one".