12507144 has 32 divisors (see below), whose sum is σ = 33673920. Its totient is φ = 3848256.

The previous prime is 12507139. The next prime is 12507151. The reversal of 12507144 is 44170521.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19732 + ... + 20355.

It is an arithmetic number, because the mean of its divisors is an integer number (1052310).

Almost surely, 2^12507144 is an apocalyptic number.

It is an amenable number.

12507144 is an abundant number, since it is smaller than the sum of its proper divisors (21166776).

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

12507144 is a wasteful number, since it uses less digits than its factorization.

12507144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40109 (or 40105 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 12507144 is about 3536.5440757892. The cubic root of 12507144 is about 232.1236459413.

Adding to 12507144 its reverse (44170521), we get a palindrome (56677665).

The spelling of 12507144 in words is "twelve million, five hundred seven thousand, one hundred forty-four".