13661229 has 16 divisors (see below), whose sum is σ = 18798912. Its totient is φ = 8819328.

The previous prime is 13661201. The next prime is 13661231. The reversal of 13661229 is 92216631.

It is not a de Polignac number, because 13661229 - 2²³ = 5272621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13661196 and 13661205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661269) 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 15 ways as a sum of consecutive naturals, for example, 17287 + ... + 18059.

It is an arithmetic number, because the mean of its divisors is an integer number (1174932).

Almost surely, 2^13661229 is an apocalyptic number.

It is an amenable number.

13661229 is a deficient number, since it is larger than the sum of its proper divisors (5137683).

13661229 is a wasteful number, since it uses less digits than its factorization.

13661229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956.

The product of its digits is 3888, while the sum is 30.

The square root of 13661229 is about 3696.1099821299. The cubic root of 13661229 is about 239.0543167689.

The spelling of 13661229 in words is "thirteen million, six hundred sixty-one thousand, two hundred twenty-nine".