304213121 has 8 divisors (see below), whose sum is σ = 308611200. Its totient is φ = 299828880.

The previous prime is 304213099. The next prime is 304213139. The reversal of 304213121 is 121312403.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304213121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 304213121.

It is not an unprimeable number, because it can be changed into a prime (304213321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45791 + ... + 52011.

It is an arithmetic number, because the mean of its divisors is an integer number (38576400).

Almost surely, 2^304213121 is an apocalyptic number.

It is an amenable number.

304213121 is a deficient number, since it is larger than the sum of its proper divisors (4398079).

304213121 is an equidigital number, since it uses as much as digits as its factorization.

304213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6919.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 304213121 is about 17441.7063672107. The cubic root of 304213121 is about 672.5521735064.

Adding to 304213121 its reverse (121312403), we get a palindrome (425525524).

The spelling of 304213121 in words is "three hundred four million, two hundred thirteen thousand, one hundred twenty-one".