1266847349 has 4 divisors (see below), whose sum is σ = 1267256640. Its totient is φ = 1266438060.

The previous prime is 1266847331. The next prime is 1266847369. The reversal of 1266847349 is 9437486621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1266847349 - 2²⁸ = 998411893 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1266847297 and 1266847306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266847369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199967 + ... + 206204.

It is an arithmetic number, because the mean of its divisors is an integer number (316814160).

Almost surely, 2^1266847349 is an apocalyptic number.

It is an amenable number.

1266847349 is a deficient number, since it is larger than the sum of its proper divisors (409291).

1266847349 is an equidigital number, since it uses as much as digits as its factorization.

1266847349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409290.

The product of its digits is 1741824, while the sum is 50.

The square root of 1266847349 is about 35592.7991172372. The cubic root of 1266847349 is about 1082.0352992266.

The spelling of 1266847349 in words is "one billion, two hundred sixty-six million, eight hundred forty-seven thousand, three hundred forty-nine".