12491144 has 8 divisors (see below), whose sum is σ = 23420910. Its totient is φ = 6245568.

The previous prime is 12491137. The next prime is 12491159. The reversal of 12491144 is 44119421.

12491144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 11303044 + 1188100 = 3362^2 + 1090^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 780689 + ... + 780704.

Almost surely, 2^12491144 is an apocalyptic number.

It is an amenable number.

12491144 is a deficient number, since it is larger than the sum of its proper divisors (10929766).

12491144 is a wasteful number, since it uses less digits than its factorization.

12491144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561399 (or 1561395 counting only the distinct ones).

The product of its digits is 1152, while the sum is 26.

The square root of 12491144 is about 3534.2812564933. The cubic root of 12491144 is about 232.0246208512.

The spelling of 12491144 in words is "twelve million, four hundred ninety-one thousand, one hundred forty-four".