1263505852 has 24 divisors (see below), whose sum is σ = 2660013440. Its totient is φ = 513002160.

The previous prime is 1263505829. The next prime is 1263505853. The reversal of 1263505852 is 2585053621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263505853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1186974 + ... + 1188037.

Almost surely, 2^1263505852 is an apocalyptic number.

It is an amenable number.

1263505852 is an abundant number, since it is smaller than the sum of its proper divisors (1396507588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263505852 is a wasteful number, since it uses less digits than its factorization.

1263505852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2375041 (or 2375039 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 1263505852 is about 35545.8274907196. The cubic root of 1263505852 is about 1081.0831189227.

The spelling of 1263505852 in words is "one billion, two hundred sixty-three million, five hundred five thousand, eight hundred fifty-two".