1263142500 has 120 divisors (see below), whose sum is σ = 3900026592. Its totient is φ = 316992000.

The previous prime is 1263142471. The next prime is 1263142513. The reversal of 1263142500 is 52413621.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 122547 + ... + 132453.

Almost surely, 2^1263142500 is an apocalyptic number.

1263142500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263142500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1950013296).

1263142500 is an abundant number, since it is smaller than the sum of its proper divisors (2636884092).

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

1263142500 is a wasteful number, since it uses less digits than its factorization.

1263142500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9951 (or 9934 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 1263142500 is about 35540.7160873272. The cubic root of 1263142500 is about 1080.9794783596.

The spelling of 1263142500 in words is "one billion, two hundred sixty-three million, one hundred forty-two thousand, five hundred".