1245555000 has 240 divisors, whose sum is σ = 4276443600. Its totient is φ = 327360000.

The previous prime is 1245554993. The next prime is 1245555011. The reversal of 1245555000 is 5555421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4004845 + ... + 4005155.

It is an arithmetic number, because the mean of its divisors is an integer number (17818515).

Almost surely, 2^1245555000 is an apocalyptic number.

1245555000 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 1245555000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138221800).

1245555000 is an abundant number, since it is smaller than the sum of its proper divisors (3030888600).

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

1245555000 is a wasteful number, since it uses less digits than its factorization.

1245555000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 1245555000 is about 35292.4212827627. The cubic root of 1245555000 is about 1075.9389668859.

The spelling of 1245555000 in words is "one billion, two hundred forty-five million, five hundred fifty-five thousand".