1263947085 has 20 divisors (see below), whose sum is σ = 2265742908. Its totient is φ = 674104896.

The previous prime is 1263947071. The next prime is 1263947101. The reversal of 1263947085 is 5807493621.

1263947085 is a `hidden beast` number, since 1 + 2 + 639 + 4 + 7 + 0 + 8 + 5 = 666.

1263947085 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 687803076 + 576144009 = 26226^2 + 24003^2 .

It is not a de Polignac number, because 1263947085 - 2¹⁷ = 1263816013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

1263947085 is strictly pandigital in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1263947085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1560024 + ... + 1560833.

It is a 1-persistent number, because it is pandigital, but 2⋅1263947085 = 2527894170 is not.

Almost surely, 2^1263947085 is an apocalyptic number.

1263947085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1263947085 is a deficient number, since it is larger than the sum of its proper divisors (1001795823).

1263947085 is an equidigital number, since it uses as much as digits as its factorization.

1263947085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120874 (or 3120865 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 1263947085 is about 35552.0334861453. The cubic root of 1263947085 is about 1081.2089471310.

The spelling of 1263947085 in words is "one billion, two hundred sixty-three million, nine hundred forty-seven thousand, eighty-five".