1263263265 has 24 divisors (see below), whose sum is σ = 2388716928. Its totient is φ = 612491040.

The previous prime is 1263263231. The next prime is 1263263269. The reversal of 1263263265 is 5623623621.

1263263265 is a `hidden beast` number, since 1 + 2 + 6 + 326 + 326 + 5 = 666.

1263263265 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1263263265 - 2⁷ = 1263263137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1263263269) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1275529 + ... + 1276518.

It is an arithmetic number, because the mean of its divisors is an integer number (99529872).

Almost surely, 2^1263263265 is an apocalyptic number.

1263263265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1263263265 is a deficient number, since it is larger than the sum of its proper divisors (1125453663).

1263263265 is a wasteful number, since it uses less digits than its factorization.

1263263265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2552069 (or 2552066 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 1263263265 is about 35542.4150136144. The cubic root of 1263263265 is about 1081.0139269212.

Adding to 1263263265 its reverse (5623623621), we get a palindrome (6886886886).

The spelling of 1263263265 in words is "one billion, two hundred sixty-three million, two hundred sixty-three thousand, two hundred sixty-five".