1263947552 has 72 divisors (see below), whose sum is σ = 3065004684. Its totient is φ = 509816832.

The previous prime is 1263947537. The next prime is 1263947567. The reversal of 1263947552 is 2557493621.

It is an interprime number because it is at equal distance from previous prime (1263947537) and next prime (1263947567).

It can be written as a sum of positive squares in 2 ways, for example, as 1258546576 + 5400976 = 35476^2 + 2324^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2948 + ... + 50364.

Almost surely, 2^1263947552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263947552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1532502342).

1263947552 is an abundant number, since it is smaller than the sum of its proper divisors (1801057132).

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

1263947552 is a wasteful number, since it uses less digits than its factorization.

1263947552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47458 (or 47443 counting only the distinct ones).

The product of its digits is 453600, while the sum is 44.

The square root of 1263947552 is about 35552.0400539828. The cubic root of 1263947552 is about 1081.2090802918.

The spelling of 1263947552 in words is "one billion, two hundred sixty-three million, nine hundred forty-seven thousand, five hundred fifty-two".