13281349 has 4 divisors (see below), whose sum is σ = 13323564. Its totient is φ = 13239136.

The previous prime is 13281329. The next prime is 13281371. The reversal of 13281349 is 94318231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94318231 = 7 ⋅13474033.

It can be written as a sum of positive squares in 2 ways, for example, as 4389025 + 8892324 = 2095^2 + 2982^2 .

It is a cyclic number.

It is not a de Polignac number, because 13281349 - 2⁷ = 13281221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13281349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13281329) 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, 20632 + ... + 21265.

It is an arithmetic number, because the mean of its divisors is an integer number (3330891).

Almost surely, 2^13281349 is an apocalyptic number.

It is an amenable number.

13281349 is a deficient number, since it is larger than the sum of its proper divisors (42215).

13281349 is an equidigital number, since it uses as much as digits as its factorization.

13281349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42214.

The product of its digits is 5184, while the sum is 31.

The square root of 13281349 is about 3644.3585169409. The cubic root of 13281349 is about 236.8176477158.

The spelling of 13281349 in words is "thirteen million, two hundred eighty-one thousand, three hundred forty-nine".