1226361139 has 2 divisors, whose sum is σ = 1226361140. Its totient is φ = 1226361138.

The previous prime is 1226361131. The next prime is 1226361163. The reversal of 1226361139 is 9311636221.

It is a weak prime.

It is an emirp because it is prime and its reverse (9311636221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1226361139 - 2³ = 1226361131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226361131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613180569 + 613180570.

It is an arithmetic number, because the mean of its divisors is an integer number (613180570).

Almost surely, 2^1226361139 is an apocalyptic number.

1226361139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226361139 is an equidigital number, since it uses as much as digits as its factorization.

1226361139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 34.

The square root of 1226361139 is about 35019.4394444000. The cubic root of 1226361139 is about 1070.3836336543.

The spelling of 1226361139 in words is "one billion, two hundred twenty-six million, three hundred sixty-one thousand, one hundred thirty-nine".