1245888000 has 640 divisors, whose sum is σ = 5311088640. Its totient is φ = 282009600.

The previous prime is 1245887971. The next prime is 1245888023. The reversal of 1245888000 is 8885421.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 12095949 + ... + 12096051.

It is an arithmetic number, because the mean of its divisors is an integer number (8298576).

Almost surely, 2^1245888000 is an apocalyptic number.

1245888000 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 1245888000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2655544320).

1245888000 is an abundant number, since it is smaller than the sum of its proper divisors (4065200640).

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

1245888000 is an equidigital number, since it uses as much as digits as its factorization.

1245888000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 1245888000 is about 35297.1386942341. The cubic root of 1245888000 is about 1076.0348426872.

The spelling of 1245888000 in words is "one billion, two hundred forty-five million, eight hundred eighty-eight thousand".