1266947447 has 8 divisors (see below), whose sum is σ = 1319436000. Its totient is φ = 1215045664.

The previous prime is 1266947419. The next prime is 1266947471. The reversal of 1266947447 is 7447496621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266947447 - 2¹⁰ = 1266946423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1266947395 and 1266947404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266947147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142283 + ... + 150924.

It is an arithmetic number, because the mean of its divisors is an integer number (164929500).

Almost surely, 2^1266947447 is an apocalyptic number.

1266947447 is a deficient number, since it is larger than the sum of its proper divisors (52488553).

1266947447 is a wasteful number, since it uses less digits than its factorization.

1266947447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293385.

The product of its digits is 2032128, while the sum is 50.

The square root of 1266947447 is about 35594.2052446743. The cubic root of 1266947447 is about 1082.0637969292.

The spelling of 1266947447 in words is "one billion, two hundred sixty-six million, nine hundred forty-seven thousand, four hundred forty-seven".