1263129447 has 8 divisors (see below), whose sum is σ = 1684717056. Its totient is φ = 841814072.

The previous prime is 1263129419. The next prime is 1263129449. The reversal of 1263129447 is 7449213621.

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 1263129447 - 2¹¹ = 1263127399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263129449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56973 + ... + 75974.

It is an arithmetic number, because the mean of its divisors is an integer number (210589632).

Almost surely, 2^1263129447 is an apocalyptic number.

1263129447 is a deficient number, since it is larger than the sum of its proper divisors (421587609).

1263129447 is a wasteful number, since it uses less digits than its factorization.

1263129447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136117.

The product of its digits is 72576, while the sum is 39.

The square root of 1263129447 is about 35540.5324523986. The cubic root of 1263129447 is about 1080.9757548226.

The spelling of 1263129447 in words is "one billion, two hundred sixty-three million, one hundred twenty-nine thousand, four hundred forty-seven".