304147421 has 16 divisors (see below), whose sum is σ = 324048000. Its totient is φ = 284663808.

The previous prime is 304147411. The next prime is 304147433. The reversal of 304147421 is 124741403.

It is a cyclic number.

It is not a de Polignac number, because 304147421 - 2¹⁸ = 303885277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304147411) 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, 971561 + ... + 971873.

It is an arithmetic number, because the mean of its divisors is an integer number (20253000).

Almost surely, 2^304147421 is an apocalyptic number.

It is an amenable number.

304147421 is a deficient number, since it is larger than the sum of its proper divisors (19900579).

304147421 is a wasteful number, since it uses less digits than its factorization.

304147421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 304147421 is about 17439.8228488709. The cubic root of 304147421 is about 672.5037536585.

Adding to 304147421 its reverse (124741403), we get a palindrome (428888824).

The spelling of 304147421 in words is "three hundred four million, one hundred forty-seven thousand, four hundred twenty-one".