12281604 has 12 divisors (see below), whose sum is σ = 28657104. Its totient is φ = 4093864.

The previous prime is 12281603. The next prime is 12281641. The reversal of 12281604 is 40618221.

12281604 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (12281603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511722 + ... + 511745.

It is an arithmetic number, because the mean of its divisors is an integer number (2388092).

Almost surely, 2^12281604 is an apocalyptic number.

It is an amenable number.

12281604 is an abundant number, since it is smaller than the sum of its proper divisors (16375500).

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

12281604 is a wasteful number, since it uses less digits than its factorization.

12281604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023474 (or 1023472 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 12281604 is about 3504.5119489024. The cubic root of 12281604 is about 230.7198868516.

Adding to 12281604 its reverse (40618221), we get a palindrome (52899825).

The spelling of 12281604 in words is "twelve million, two hundred eighty-one thousand, six hundred four".