12643460 has 24 divisors (see below), whose sum is σ = 26694360. Its totient is φ = 5030144.

The previous prime is 12643459. The next prime is 12643469. The reversal of 12643460 is 6434621.

It can be written as a sum of positive squares in 4 ways, for example, as 4937284 + 7706176 = 2222^2 + 2776^2 .

It is not an unprimeable number, because it can be changed into a prime (12643469) 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, 2336 + ... + 5544.

It is an arithmetic number, because the mean of its divisors is an integer number (1112265).

Almost surely, 2^12643460 is an apocalyptic number.

12643460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12643460 is an abundant number, since it is smaller than the sum of its proper divisors (14050900).

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

12643460 is a wasteful number, since it uses less digits than its factorization.

12643460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415 (or 3413 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 12643460 is about 3555.7643341481. The cubic root of 12643460 is about 232.9639097521.

The spelling of 12643460 in words is "twelve million, six hundred forty-three thousand, four hundred sixty".