1245243600 has 180 divisors, whose sum is σ = 4346364672. Its totient is φ = 330144000.

The previous prime is 1245243599. The next prime is 1245243607. The reversal of 1245243600 is 63425421.

1245243600 is a `hidden beast` number, since 1 + 2 + 4 + 52 + 4 + 3 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1245243607) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 686695 + ... + 688505.

Almost surely, 2^1245243600 is an apocalyptic number.

1245243600 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 1245243600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2173182336).

1245243600 is an abundant number, since it is smaller than the sum of its proper divisors (3101121072).

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

1245243600 is a wasteful number, since it uses less digits than its factorization.

1245243600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026 (or 2012 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1245243600 is about 35288.0092949432. The cubic root of 1245243600 is about 1075.8492945926.

The spelling of 1245243600 in words is "one billion, two hundred forty-five million, two hundred forty-three thousand, six hundred".