1126345261 has 2 divisors, whose sum is σ = 1126345262. Its totient is φ = 1126345260.

The previous prime is 1126345249. The next prime is 1126345267. The reversal of 1126345261 is 1625436211.

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., 597069225 + 529276036 = 24435^2 + 23006^2 .

It is a cyclic number.

It is not a de Polignac number, because 1126345261 - 2⁹ = 1126344749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1126345267) 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, 563172630 + 563172631.

It is an arithmetic number, because the mean of its divisors is an integer number (563172631).

Almost surely, 2^1126345261 is an apocalyptic number.

It is an amenable number.

1126345261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1126345261 is an equidigital number, since it uses as much as digits as its factorization.

1126345261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 1126345261 is about 33561.0676379641. The cubic root of 1126345261 is about 1040.4563027869.

The spelling of 1126345261 in words is "one billion, one hundred twenty-six million, three hundred forty-five thousand, two hundred sixty-one".