1245105200 has 120 divisors (see below), whose sum is σ = 3089468928. Its totient is φ = 481962240.

The previous prime is 1245105193. The next prime is 1245105233. The reversal of 1245105200 is 25015421.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 23 ways as a sum of consecutive naturals, for example, 1936079 + ... + 1936721.

Almost surely, 2^1245105200 is an apocalyptic number.

1245105200 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 1245105200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1544734464).

1245105200 is an abundant number, since it is smaller than the sum of its proper divisors (1844363728).

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

1245105200 is a wasteful number, since it uses less digits than its factorization.

1245105200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 811 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1245105200 is about 35286.0482343943. The cubic root of 1245105200 is about 1075.8094354413.

The spelling of 1245105200 in words is "one billion, two hundred forty-five million, one hundred five thousand, two hundred".