12216004 has 6 divisors (see below), whose sum is σ = 21378014. Its totient is φ = 6108000.

The previous prime is 12215971. The next prime is 12216037. The reversal of 12216004 is 40061221.

12216004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12215971) and next prime (12216037).

It can be written as a sum of positive squares in only one way, i.e., 11235904 + 980100 = 3352^2 + 990^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1526997 + ... + 1527004.

Almost surely, 2^12216004 is an apocalyptic number.

It is an amenable number.

12216004 is a deficient number, since it is larger than the sum of its proper divisors (9162010).

12216004 is a wasteful number, since it uses less digits than its factorization.

12216004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054005 (or 3054003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 12216004 is about 3495.1400544184. The cubic root of 12216004 is about 230.3083702398.

Adding to 12216004 its reverse (40061221), we get a palindrome (52277225).

It can be divided in two parts, 1221 and 6004, that added together give a square (7225 = 85²).

The spelling of 12216004 in words is "twelve million, two hundred sixteen thousand, four".