1222665149 has 2 divisors, whose sum is σ = 1222665150. Its totient is φ = 1222665148.

The previous prime is 1222665091. The next prime is 1222665163. The reversal of 1222665149 is 9415662221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 870840100 + 351825049 = 29510^2 + 18757^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222665149 - 2¹² = 1222661053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222665949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611332574 + 611332575.

It is an arithmetic number, because the mean of its divisors is an integer number (611332575).

Almost surely, 2^1222665149 is an apocalyptic number.

It is an amenable number.

1222665149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222665149 is an equidigital number, since it uses as much as digits as its factorization.

1222665149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The square root of 1222665149 is about 34966.6290768784. The cubic root of 1222665149 is about 1069.3072492042.

The spelling of 1222665149 in words is "one billion, two hundred twenty-two million, six hundred sixty-five thousand, one hundred forty-nine".