12781148 has 24 divisors (see below), whose sum is σ = 24097920. Its totient is φ = 5911920.

The previous prime is 12781117. The next prime is 12781159. The reversal of 12781148 is 84118721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1313 + ... + 5223.

It is an arithmetic number, because the mean of its divisors is an integer number (1004080).

Almost surely, 2^12781148 is an apocalyptic number.

It is an amenable number.

12781148 is a deficient number, since it is larger than the sum of its proper divisors (11316772).

12781148 is a wasteful number, since it uses less digits than its factorization.

12781148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977 (or 3975 counting only the distinct ones).

The product of its digits is 3584, while the sum is 32.

The square root of 12781148 is about 3575.0731461048. The cubic root of 12781148 is about 233.8065218345.

Adding to 12781148 its reverse (84118721), we get a palindrome (96899869).

The spelling of 12781148 in words is "twelve million, seven hundred eighty-one thousand, one hundred forty-eight".