12345616 has 20 divisors (see below), whose sum is σ = 23981724. Its totient is φ = 6156800.

The previous prime is 12345581. The next prime is 12345623. The reversal of 12345616 is 61654321.

It can be written as a sum of positive squares in 2 ways, for example, as 4393216 + 7952400 = 2096^2 + 2820^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7596 + ... + 9076.

Almost surely, 2^12345616 is an apocalyptic number.

12345616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12345616 is a deficient number, since it is larger than the sum of its proper divisors (11636108).

12345616 is a wasteful number, since it uses less digits than its factorization.

12345616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010 (or 2004 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 12345616 is about 3513.6328778061. The cubic root of 12345616 is about 231.1200315700.

Adding to 12345616 its reverse (61654321), we get a palindrome (73999937).

The spelling of 12345616 in words is "twelve million, three hundred forty-five thousand, six hundred sixteen".