13144287 has 16 divisors (see below), whose sum is σ = 19386080. Its totient is φ = 7869312.

The previous prime is 13144277. The next prime is 13144291. The reversal of 13144287 is 78244131.

13144287 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13144287 - 2¹⁵ = 13111519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13144267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3112 + ... + 5997.

It is an arithmetic number, because the mean of its divisors is an integer number (1211630).

Almost surely, 2^13144287 is an apocalyptic number.

13144287 is a deficient number, since it is larger than the sum of its proper divisors (6241793).

13144287 is a wasteful number, since it uses less digits than its factorization.

13144287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9162.

The product of its digits is 5376, while the sum is 30.

The square root of 13144287 is about 3625.5050682629. The cubic root of 13144287 is about 236.0001855308. Note that the first 3 decimals are identical.

It can be divided in two parts, 13144 and 287, that added together give a palindrome (13431).

The spelling of 13144287 in words is "thirteen million, one hundred forty-four thousand, two hundred eighty-seven".