1224434381 has 2 divisors, whose sum is σ = 1224434382. Its totient is φ = 1224434380.

The previous prime is 1224434359. The next prime is 1224434399. The reversal of 1224434381 is 1834344221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1009078756 + 215355625 = 31766^2 + 14675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1224434381 is a prime.

It is a super-2 number, since 2×1224434381² = 2998479106749706322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224334381) 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, 612217190 + 612217191.

It is an arithmetic number, because the mean of its divisors is an integer number (612217191).

Almost surely, 2^1224434381 is an apocalyptic number.

It is an amenable number.

1224434381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224434381 is an equidigital number, since it uses as much as digits as its factorization.

1224434381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 32.

The square root of 1224434381 is about 34991.9187956305. The cubic root of 1224434381 is about 1069.8227735121.

The spelling of 1224434381 in words is "one billion, two hundred twenty-four million, four hundred thirty-four thousand, three hundred eighty-one".