1263263125 has 20 divisors (see below), whose sum is σ = 1582652764. Its totient is φ = 1008000000.

The previous prime is 1263263093. The next prime is 1263263137. The reversal of 1263263125 is 5213623621.

It is a happy number.

It can be written as a sum of positive squares in 10 ways, for example, as 1221712209 + 41550916 = 34953^2 + 6446^2 .

It is not a de Polignac number, because 1263263125 - 2⁵ = 1263263093 is a prime.

It is a Duffinian number.

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, 260725 + ... + 265525.

Almost surely, 2^1263263125 is an apocalyptic number.

It is an amenable number.

1263263125 is a deficient number, since it is larger than the sum of its proper divisors (319389639).

1263263125 is an frugal number, since it uses more digits than its factorization.

1263263125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242 (or 5227 counting only the distinct ones).

The product of its digits is 12960, while the sum is 31.

The square root of 1263263125 is about 35542.4130441364. The cubic root of 1263263125 is about 1081.0138869871.

Adding to 1263263125 its reverse (5213623621), we get a palindrome (6476886746).

It can be divided in two parts, 12632 and 63125, that added together give a palindrome (75757).

The spelling of 1263263125 in words is "one billion, two hundred sixty-three million, two hundred sixty-three thousand, one hundred twenty-five".