1245648000 has 128 divisors (see below), whose sum is σ = 4129482240. Its totient is φ = 332160000.

The previous prime is 1245647969. The next prime is 1245648017. The reversal of 1245648000 is 8465421.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35025 + ... + 60975.

It is an arithmetic number, because the mean of its divisors is an integer number (32261580).

Almost surely, 2^1245648000 is an apocalyptic number.

1245648000 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 1245648000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2064741120).

1245648000 is an abundant number, since it is smaller than the sum of its proper divisors (2883834240).

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

1245648000 is an equidigital number, since it uses as much as digits as its factorization.

1245648000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25983 (or 25961 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 1245648000 is about 35293.7388214964. The cubic root of 1245648000 is about 1075.9657447302.

The spelling of 1245648000 in words is "one billion, two hundred forty-five million, six hundred forty-eight thousand".