1125854266409 has 2 divisors, whose sum is σ = 1125854266410. Its totient is φ = 1125854266408.

The previous prime is 1125854266403. The next prime is 1125854266423. The reversal of 1125854266409 is 9046624585211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 721485456409 + 404368810000 = 849403^2 + 635900^2 .

It is an emirp because it is prime and its reverse (9046624585211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1125854266409 - 2⁸ = 1125854266153 is a prime.

It is not a weakly prime, because it can be changed into another prime (1125854266403) 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, 562927133204 + 562927133205.

It is an arithmetic number, because the mean of its divisors is an integer number (562927133205).

Almost surely, 2^{1125854266409} is an apocalyptic number.

It is an amenable number.

1125854266409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125854266409 is an equidigital number, since it uses as much as digits as its factorization.

1125854266409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4147200, while the sum is 53.

The spelling of 1125854266409 in words is "one trillion, one hundred twenty-five billion, eight hundred fifty-four million, two hundred sixty-six thousand, four hundred nine".