1263124720 has 160 divisors (see below), whose sum is σ = 3535648704. Its totient is φ = 413491200.

The previous prime is 1263124717. The next prime is 1263124781. The reversal of 1263124720 is 274213621.

1263124720 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 467694 + ... + 470386.

Almost surely, 2^1263124720 is an apocalyptic number.

1263124720 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 1263124720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1767824352).

1263124720 is an abundant number, since it is smaller than the sum of its proper divisors (2272523984).

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

1263124720 is a wasteful number, since it uses less digits than its factorization.

1263124720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2771 (or 2765 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 1263124720 is about 35540.4659508004. The cubic root of 1263124720 is about 1080.9744063784.

The spelling of 1263124720 in words is "one billion, two hundred sixty-three million, one hundred twenty-four thousand, seven hundred twenty".