1263857052 has 12 divisors (see below), whose sum is σ = 2948999816. Its totient is φ = 421285680.

The previous prime is 1263857047. The next prime is 1263857053. The reversal of 1263857052 is 2507583621.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1263857052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263857053) 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 3 ways as a sum of consecutive naturals, for example, 52660699 + ... + 52660722.

Almost surely, 2^1263857052 is an apocalyptic number.

1263857052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1263857052 is an abundant number, since it is smaller than the sum of its proper divisors (1685142764).

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

1263857052 is a wasteful number, since it uses less digits than its factorization.

1263857052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105321428 (or 105321426 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 1263857052 is about 35550.7672491045. The cubic root of 1263857052 is about 1081.1832744327.

The spelling of 1263857052 in words is "one billion, two hundred sixty-three million, eight hundred fifty-seven thousand, fifty-two".