12640512 has 72 divisors (see below), whose sum is σ = 34175680. Its totient is φ = 4147200.

The previous prime is 12640499. The next prime is 12640513. The reversal of 12640512 is 21504621.

It is not an unprimeable number, because it can be changed into a prime (12640513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83637 + ... + 83787.

Almost surely, 2^12640512 is an apocalyptic number.

12640512 is a gapful number since it is divisible by the number (12) 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 12640512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17087840).

12640512 is an abundant number, since it is smaller than the sum of its proper divisors (21535168).

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

12640512 is a wasteful number, since it uses less digits than its factorization.

12640512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 12640512 is about 3555.3497718227. The cubic root of 12640512 is about 232.9458020772.

The spelling of 12640512 in words is "twelve million, six hundred forty thousand, five hundred twelve".