12307144 has 8 divisors (see below), whose sum is σ = 23075910. Its totient is φ = 6153568.

The previous prime is 12307109. The next prime is 12307171. The reversal of 12307144 is 44170321.

It can be written as a sum of positive squares in only one way, i.e., 10484644 + 1822500 = 3238^2 + 1350^2 .

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

It is a super-3 number, since 3×12307144³ (a number of 22 digits) contains 333 as substring.

It is an unprimeable number.

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, 769189 + ... + 769204.

Almost surely, 2^12307144 is an apocalyptic number.

It is an amenable number.

12307144 is a deficient number, since it is larger than the sum of its proper divisors (10768766).

12307144 is a wasteful number, since it uses less digits than its factorization.

12307144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538399 (or 1538395 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 12307144 is about 3508.1539304882. The cubic root of 12307144 is about 230.8797059874.

Adding to 12307144 its reverse (44170321), we get a palindrome (56477465).

The spelling of 12307144 in words is "twelve million, three hundred seven thousand, one hundred forty-four".