13680146 has 4 divisors (see below), whose sum is σ = 20520222. Its totient is φ = 6840072.

The previous prime is 13680113. The next prime is 13680167. The reversal of 13680146 is 64108631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12524521 + 1155625 = 3539^2 + 1075^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3420035 + ... + 3420038.

Almost surely, 2^13680146 is an apocalyptic number.

13680146 is a deficient number, since it is larger than the sum of its proper divisors (6840076).

13680146 is an equidigital number, since it uses as much as digits as its factorization.

13680146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6840075.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 13680146 is about 3698.6681386683. The cubic root of 13680146 is about 239.1646071093.

Adding to 13680146 its reverse (64108631), we get a palindrome (77788777).

The spelling of 13680146 in words is "thirteen million, six hundred eighty thousand, one hundred forty-six".