1247424000 has 320 divisors, whose sum is σ = 4251424320. Its totient is φ = 324403200.

The previous prime is 1247423999. The next prime is 1247424007. The reversal of 1247424000 is 4247421.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247424007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14015956 + ... + 14016044.

It is an arithmetic number, because the mean of its divisors is an integer number (13285701).

Almost surely, 2^1247424000 is an apocalyptic number.

1247424000 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 1247424000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2125712160).

1247424000 is an abundant number, since it is smaller than the sum of its proper divisors (3004000320).

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

1247424000 is an frugal number, since it uses more digits than its factorization.

1247424000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 1247424000 is about 35318.8901297875. The cubic root of 1247424000 is about 1076.4768596171.

The spelling of 1247424000 in words is "one billion, two hundred forty-seven million, four hundred twenty-four thousand".