1263807645 has 8 divisors (see below), whose sum is σ = 2022092256. Its totient is φ = 674030736.

The previous prime is 1263807619. The next prime is 1263807653. The reversal of 1263807645 is 5467083621.

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

It is not a de Polignac number, because 1263807645 - 2⁵ = 1263807613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1263807597 and 1263807606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42126907 + ... + 42126936.

It is an arithmetic number, because the mean of its divisors is an integer number (252761532).

Almost surely, 2^1263807645 is an apocalyptic number.

1263807645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1263807645 is a deficient number, since it is larger than the sum of its proper divisors (758284611).

1263807645 is an equidigital number, since it uses as much as digits as its factorization.

1263807645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84253851.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 1263807645 is about 35550.0723627956. The cubic root of 1263807645 is about 1081.1691856247.

The spelling of 1263807645 in words is "one billion, two hundred sixty-three million, eight hundred seven thousand, six hundred forty-five".