13144357 has 4 divisors (see below), whose sum is σ = 13152780. Its totient is φ = 13135936.

The previous prime is 13144343. The next prime is 13144393. The reversal of 13144357 is 75344131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3896676 + 9247681 = 1974^2 + 3041^2 .

It is a cyclic number.

It is not a de Polignac number, because 13144357 - 2¹⁵ = 13111589 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 (13144057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108 + ... + 5245.

It is an arithmetic number, because the mean of its divisors is an integer number (3288195).

Almost surely, 2^13144357 is an apocalyptic number.

It is an amenable number.

13144357 is a deficient number, since it is larger than the sum of its proper divisors (8423).

13144357 is an equidigital number, since it uses as much as digits as its factorization.

13144357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8422.

The product of its digits is 5040, while the sum is 28.

The square root of 13144357 is about 3625.5147220774. The cubic root of 13144357 is about 236.0006044703. Note that the first 3 decimals are identical.

Adding to 13144357 its reverse (75344131), we get a palindrome (88488488).

It can be divided in two parts, 1314 and 4357, that added together give a triangular number (5671 = T₁₀₆).

The spelling of 13144357 in words is "thirteen million, one hundred forty-four thousand, three hundred fifty-seven".