13685145 has 8 divisors (see below), whose sum is σ = 21896256. Its totient is φ = 7298736.

The previous prime is 13685141. The next prime is 13685159. The reversal of 13685145 is 54158631.

Added to its reverse (54158631) it gives a triangular number (67843776 = T₁₁₆₄₈).

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

It is not a de Polignac number, because 13685145 - 2² = 13685141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13685141) 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, 456157 + ... + 456186.

It is an arithmetic number, because the mean of its divisors is an integer number (2737032).

Almost surely, 2^13685145 is an apocalyptic number.

13685145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13685145 is a deficient number, since it is larger than the sum of its proper divisors (8211111).

13685145 is an equidigital number, since it uses as much as digits as its factorization.

13685145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912351.

The product of its digits is 14400, while the sum is 33.

The square root of 13685145 is about 3699.3438607407. The cubic root of 13685145 is about 239.1937354112.

Adding to 13685145 its reverse (54158631), we get a triangular number (67843776 = T₁₁₆₄₈).

It can be divided in two parts, 136851 and 45, that multiplied together give a triangular number (6158295 = T₃₅₀₉).

The spelling of 13685145 in words is "thirteen million, six hundred eighty-five thousand, one hundred forty-five".