12280616 has 8 divisors (see below), whose sum is σ = 23026170. Its totient is φ = 6140304.

The previous prime is 12280591. The next prime is 12280621. The reversal of 12280616 is 61608221.

12280616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7236100 + 5044516 = 2690^2 + 2246^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 767531 + ... + 767546.

Almost surely, 2^12280616 is an apocalyptic number.

It is an amenable number.

12280616 is a deficient number, since it is larger than the sum of its proper divisors (10745554).

12280616 is a wasteful number, since it uses less digits than its factorization.

12280616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535083 (or 1535079 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 12280616 is about 3504.3709849273. The cubic root of 12280616 is about 230.7136998920.

Adding to 12280616 its reverse (61608221), we get a palindrome (73888837).

The spelling of 12280616 in words is "twelve million, two hundred eighty thousand, six hundred sixteen".