305112421 has 2 divisors, whose sum is σ = 305112422. Its totient is φ = 305112420.

The previous prime is 305112383. The next prime is 305112461. The reversal of 305112421 is 124211503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241336225 + 63776196 = 15535^2 + 7986^2 .

It is a cyclic number.

It is not a de Polignac number, because 305112421 - 2¹⁵ = 305079653 is a prime.

It is equal to p_16514200 and since 305112421 and 16514200 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (305112461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152556210 + 152556211.

It is an arithmetic number, because the mean of its divisors is an integer number (152556211).

Almost surely, 2^305112421 is an apocalyptic number.

It is an amenable number.

305112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

305112421 is an equidigital number, since it uses as much as digits as its factorization.

305112421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 305112421 is about 17467.4675039057. The cubic root of 305112421 is about 673.2142435256.

Adding to 305112421 its reverse (124211503), we get a palindrome (429323924).

The spelling of 305112421 in words is "three hundred five million, one hundred twelve thousand, four hundred twenty-one".