1266367849 has 4 divisors (see below), whose sum is σ = 1290261636. Its totient is φ = 1242474064.

The previous prime is 1266367819. The next prime is 1266367877. The reversal of 1266367849 is 9487636621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 515607849 + 750760000 = 22707^2 + 27400^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266367849 - 2⁷ = 1266367721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1266367796 and 1266367805.

It is not an unprimeable number, because it can be changed into a prime (1266367819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11946814 + ... + 11946919.

It is an arithmetic number, because the mean of its divisors is an integer number (322565409).

Almost surely, 2^1266367849 is an apocalyptic number.

It is an amenable number.

1266367849 is a deficient number, since it is larger than the sum of its proper divisors (23893787).

1266367849 is an equidigital number, since it uses as much as digits as its factorization.

1266367849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23893786.

The product of its digits is 2612736, while the sum is 52.

The square root of 1266367849 is about 35586.0625666847. The cubic root of 1266367849 is about 1081.8987657025.

The spelling of 1266367849 in words is "one billion, two hundred sixty-six million, three hundred sixty-seven thousand, eight hundred forty-nine".