1261032663 has 64 divisors (see below), whose sum is σ = 1962639360. Its totient is φ = 713059200.

The previous prime is 1261032637. The next prime is 1261032673. The reversal of 1261032663 is 3662301621.

It is not a de Polignac number, because 1261032663 - 2⁸ = 1261032407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1261032663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261032673) 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 63 ways as a sum of consecutive naturals, for example, 4794670 + ... + 4794932.

It is an arithmetic number, because the mean of its divisors is an integer number (30666240).

Almost surely, 2^1261032663 is an apocalyptic number.

1261032663 is a deficient number, since it is larger than the sum of its proper divisors (701606697).

1261032663 is a wasteful number, since it uses less digits than its factorization.

1261032663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460.

The product of its (nonzero) digits is 7776, while the sum is 30.

The square root of 1261032663 is about 35511.0217115757. The cubic root of 1261032663 is about 1080.3772867363.

The spelling of 1261032663 in words is "one billion, two hundred sixty-one million, thirty-two thousand, six hundred sixty-three".