13667145 has 32 divisors (see below), whose sum is σ = 22788864. Its totient is φ = 6988800.

The previous prime is 13667141. The next prime is 13667153. The reversal of 13667145 is 54176631.

Added to its reverse (54176631) it gives a triangular number (67843776 = T₁₁₆₄₈).

13667145 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13667145 - 2² = 13667141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13667141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43509 + ... + 43821.

It is an arithmetic number, because the mean of its divisors is an integer number (712152).

Almost surely, 2^13667145 is an apocalyptic number.

13667145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13667145 is a deficient number, since it is larger than the sum of its proper divisors (9121719).

13667145 is a wasteful number, since it uses less digits than its factorization.

13667145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433.

The product of its digits is 15120, while the sum is 33.

The square root of 13667145 is about 3696.9101963667. The cubic root of 13667145 is about 239.0888193074.

Adding to 13667145 its reverse (54176631), we get a triangular number (67843776 = T₁₁₆₄₈).

The spelling of 13667145 in words is "thirteen million, six hundred sixty-seven thousand, one hundred forty-five".