1263161252 has 12 divisors (see below), whose sum is σ = 2220186780. Its totient is φ = 628822176.

The previous prime is 1263161239. The next prime is 1263161279. The reversal of 1263161252 is 2521613621.

It can be written as a sum of positive squares in 2 ways, for example, as 760325476 + 502835776 = 27574^2 + 22424^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688583 + ... + 690414.

It is an arithmetic number, because the mean of its divisors is an integer number (185015565).

Almost surely, 2^1263161252 is an apocalyptic number.

It is an amenable number.

1263161252 is a deficient number, since it is larger than the sum of its proper divisors (957025528).

1263161252 is a wasteful number, since it uses less digits than its factorization.

1263161252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379230 (or 1379228 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 1263161252 is about 35540.9798964519. The cubic root of 1263161252 is about 1080.9848275653.

Adding to 1263161252 its reverse (2521613621), we get a palindrome (3784774873).

The spelling of 1263161252 in words is "one billion, two hundred sixty-three million, one hundred sixty-one thousand, two hundred fifty-two".