12945616 has 10 divisors (see below), whose sum is σ = 25082162. Its totient is φ = 6472800.

The previous prime is 12945613. The next prime is 12945617. The reversal of 12945616 is 61654921.

It can be written as a sum of positive squares in only one way, i.e., 12931216 + 14400 = 3596^2 + 120^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12945613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 404535 + ... + 404566.

Almost surely, 2^12945616 is an apocalyptic number.

12945616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12945616 is a deficient number, since it is larger than the sum of its proper divisors (12136546).

12945616 is an equidigital number, since it uses as much as digits as its factorization.

12945616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809109 (or 809103 counting only the distinct ones).

The product of its digits is 12960, while the sum is 34.

The square root of 12945616 is about 3598.0016675927. The cubic root of 12945616 is about 234.8051259054.

The spelling of 12945616 in words is "twelve million, nine hundred forty-five thousand, six hundred sixteen".