1263875144 has 32 divisors (see below), whose sum is σ = 2713564800. Its totient is φ = 540608640.

The previous prime is 1263875089. The next prime is 1263875159. The reversal of 1263875144 is 4415783621.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7517 + ... + 50835.

It is an arithmetic number, because the mean of its divisors is an integer number (84798900).

Almost surely, 2^1263875144 is an apocalyptic number.

1263875144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1263875144 is an abundant number, since it is smaller than the sum of its proper divisors (1449689656).

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

1263875144 is a wasteful number, since it uses less digits than its factorization.

1263875144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43853 (or 43849 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 1263875144 is about 35551.0217012113. The cubic root of 1263875144 is about 1081.1884334218.

The spelling of 1263875144 in words is "one billion, two hundred sixty-three million, eight hundred seventy-five thousand, one hundred forty-four".