306426121 has 2 divisors, whose sum is σ = 306426122. Its totient is φ = 306426120.

The previous prime is 306426097. The next prime is 306426137. The reversal of 306426121 is 121624603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166926400 + 139499721 = 12920^2 + 11811^2 .

It is a cyclic number.

It is not a de Polignac number, because 306426121 - 2⁵ = 306426089 is a prime.

It is a super-2 number, since 2×306426121² = 187793935262213282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (306426221) 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 as a sum of consecutive naturals, namely, 153213060 + 153213061.

It is an arithmetic number, because the mean of its divisors is an integer number (153213061).

Almost surely, 2^306426121 is an apocalyptic number.

It is an amenable number.

306426121 is a deficient number, since it is larger than the sum of its proper divisors (1).

306426121 is an equidigital number, since it uses as much as digits as its factorization.

306426121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 306426121 is about 17505.0313053133. The cubic root of 306426121 is about 674.1790630672.

It can be divided in two parts, 30642 and 6121, that added together give a palindrome (36763).

The spelling of 306426121 in words is "three hundred six million, four hundred twenty-six thousand, one hundred twenty-one".