1245992064 has 128 divisors (see below), whose sum is σ = 3503969280. Its totient is φ = 391480320.

The previous prime is 1245992023. The next prime is 1245992093. The reversal of 1245992064 is 4602995421.

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

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, 626079 + ... + 628065.

It is an arithmetic number, because the mean of its divisors is an integer number (27374760).

Almost surely, 2^1245992064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1245992064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1751984640).

1245992064 is an abundant number, since it is smaller than the sum of its proper divisors (2257977216).

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

1245992064 is a wasteful number, since it uses less digits than its factorization.

1245992064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098 (or 2086 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1245992064 is about 35298.6127772750. The cubic root of 1245992064 is about 1076.0648008034.

The spelling of 1245992064 in words is "one billion, two hundred forty-five million, nine hundred ninety-two thousand, sixty-four".