12154664 has 8 divisors (see below), whose sum is σ = 22790010. Its totient is φ = 6077328.

The previous prime is 12154657. The next prime is 12154669. The reversal of 12154664 is 46645121.

It can be written as a sum of positive squares in only one way, i.e., 8702500 + 3452164 = 2950^2 + 1858^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12154669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 759659 + ... + 759674.

Almost surely, 2^12154664 is an apocalyptic number.

It is an amenable number.

12154664 is a deficient number, since it is larger than the sum of its proper divisors (10635346).

12154664 is a wasteful number, since it uses less digits than its factorization.

12154664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519339 (or 1519335 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 12154664 is about 3486.3539694070. The cubic root of 12154664 is about 229.9222421458.

Adding to 12154664 its reverse (46645121), we get a palindrome (58799785).

The spelling of 12154664 in words is "twelve million, one hundred fifty-four thousand, six hundred sixty-four".