1245120800 has 576 divisors, whose sum is σ = 4252227840. Its totient is φ = 344064000.

The previous prime is 1245120791. The next prime is 1245120853. The reversal of 1245120800 is 80215421.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 30368780 + ... + 30368820.

It is an arithmetic number, because the mean of its divisors is an integer number (7382340).

Almost surely, 2^1245120800 is an apocalyptic number.

1245120800 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 1245120800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2126113920).

1245120800 is an abundant number, since it is smaller than the sum of its proper divisors (3007107040).

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

1245120800 is a wasteful number, since it uses less digits than its factorization.

1245120800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 1245120800 is about 35286.2692842414. The cubic root of 1245120800 is about 1075.8139283835.

The spelling of 1245120800 in words is "one billion, two hundred forty-five million, one hundred twenty thousand, eight hundred".