13761281 has 4 divisors (see below), whose sum is σ = 14096964. Its totient is φ = 13425600.

The previous prime is 13761229. The next prime is 13761289. The reversal of 13761281 is 18216731.

13761281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18216731 = 13 ⋅1401287.

It can be written as a sum of positive squares in 2 ways, for example, as 7924225 + 5837056 = 2815^2 + 2416^2 .

It is a cyclic number.

It is not a de Polignac number, because 13761281 - 2¹⁴ = 13744897 is a prime.

It is a super-2 number, since 2×13761281² = 378745709521922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13761289) 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, 167780 + ... + 167861.

It is an arithmetic number, because the mean of its divisors is an integer number (3524241).

Almost surely, 2^13761281 is an apocalyptic number.

It is an amenable number.

13761281 is a deficient number, since it is larger than the sum of its proper divisors (335683).

13761281 is an equidigital number, since it uses as much as digits as its factorization.

13761281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335682.

The product of its digits is 2016, while the sum is 29.

The square root of 13761281 is about 3709.6200614079. The cubic root of 13761281 is about 239.6364925284.

The spelling of 13761281 in words is "thirteen million, seven hundred sixty-one thousand, two hundred eighty-one".