1226430421 has 2 divisors, whose sum is σ = 1226430422. Its totient is φ = 1226430420.

The previous prime is 1226430397. The next prime is 1226430467. The reversal of 1226430421 is 1240346221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 943349796 + 283080625 = 30714^2 + 16825^2 .

It is an emirp because it is prime and its reverse (1240346221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1226430421 - 2¹¹ = 1226428373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226431421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613215210 + 613215211.

It is an arithmetic number, because the mean of its divisors is an integer number (613215211).

Almost surely, 2^1226430421 is an apocalyptic number.

It is an amenable number.

1226430421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226430421 is an equidigital number, since it uses as much as digits as its factorization.

1226430421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 1226430421 is about 35020.4286238761. The cubic root of 1226430421 is about 1070.4037900123.

Adding to 1226430421 its reverse (1240346221), we get a palindrome (2466776642).

The spelling of 1226430421 in words is "one billion, two hundred twenty-six million, four hundred thirty thousand, four hundred twenty-one".