13661356 has 24 divisors (see below), whose sum is σ = 25127424. Its totient is φ = 6486480.

The previous prime is 13661341. The next prime is 13661357. The reversal of 13661356 is 65316631.

13661356 is nontrivially palindromic in base 12.

It is not an unprimeable number, because it can be changed into a prime (13661357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14541 + ... + 15451.

It is an arithmetic number, because the mean of its divisors is an integer number (1046976).

Almost surely, 2^13661356 is an apocalyptic number.

It is an amenable number.

13661356 is a deficient number, since it is larger than the sum of its proper divisors (11466068).

13661356 is a wasteful number, since it uses less digits than its factorization.

13661356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101 (or 1099 counting only the distinct ones).

The product of its digits is 9720, while the sum is 31.

The square root of 13661356 is about 3696.1271623146. The cubic root of 13661356 is about 239.0550575467.

Adding to 13661356 its reverse (65316631), we get a palindrome (78977987).

The spelling of 13661356 in words is "thirteen million, six hundred sixty-one thousand, three hundred fifty-six".