1261842233 has 2 divisors, whose sum is σ = 1261842234. Its totient is φ = 1261842232.

The previous prime is 1261842227. The next prime is 1261842247. The reversal of 1261842233 is 3322481621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1094087929 + 167754304 = 33077^2 + 12952^2 .

It is an emirp because it is prime and its reverse (3322481621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1261842233 - 2¹⁰ = 1261841209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1261842233.

It is not a weakly prime, because it can be changed into another prime (1261842223) 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, 630921116 + 630921117.

It is an arithmetic number, because the mean of its divisors is an integer number (630921117).

Almost surely, 2^1261842233 is an apocalyptic number.

It is an amenable number.

1261842233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261842233 is an equidigital number, since it uses as much as digits as its factorization.

1261842233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The square root of 1261842233 is about 35522.4187380308. The cubic root of 1261842233 is about 1080.6084343140.

The spelling of 1261842233 in words is "one billion, two hundred sixty-one million, eight hundred forty-two thousand, two hundred thirty-three".