13671381 has 8 divisors (see below), whose sum is σ = 18527584. Its totient is φ = 8964720.

The previous prime is 13671373. The next prime is 13671419. The reversal of 13671381 is 18317631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13671381 - 2³ = 13671373 is a prime.

It is a super-2 number, since 2×13671381² = 373813316894322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13671311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37171 + ... + 37536.

It is an arithmetic number, because the mean of its divisors is an integer number (2315948).

Almost surely, 2^13671381 is an apocalyptic number.

It is an amenable number.

13671381 is a deficient number, since it is larger than the sum of its proper divisors (4856203).

13671381 is an equidigital number, since it uses as much as digits as its factorization.

13671381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74771.

The product of its digits is 3024, while the sum is 30.

The square root of 13671381 is about 3697.4830628415. The cubic root of 13671381 is about 239.1135178484.

It can be divided in two parts, 136 and 71381, that added together give a palindrome (71517).

The spelling of 13671381 in words is "thirteen million, six hundred seventy-one thousand, three hundred eighty-one".