13243144 has 8 divisors (see below), whose sum is σ = 24830910. Its totient is φ = 6621568.

The previous prime is 13243141. The next prime is 13243157. The reversal of 13243144 is 44134231.

It can be written as a sum of positive squares in only one way, i.e., 13235044 + 8100 = 3638^2 + 90^2 .

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 (13243141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 827689 + ... + 827704.

Almost surely, 2^13243144 is an apocalyptic number.

It is an amenable number.

13243144 is a deficient number, since it is larger than the sum of its proper divisors (11587766).

13243144 is a wasteful number, since it uses less digits than its factorization.

13243144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655399 (or 1655395 counting only the distinct ones).

The product of its digits is 1152, while the sum is 22.

The square root of 13243144 is about 3639.1130787597. The cubic root of 13243144 is about 236.5903538479.

Adding to 13243144 its reverse (44134231), we get a palindrome (57377375).

The spelling of 13243144 in words is "thirteen million, two hundred forty-three thousand, one hundred forty-four".