13640146 has 16 divisors (see below), whose sum is σ = 22244544. Its totient is φ = 6235344.

The previous prime is 13640141. The next prime is 13640153. The reversal of 13640146 is 64104631.

It is a self number, because there is not a number n which added to its sum of digits gives 13640146.

It is not an unprimeable number, because it can be changed into a prime (13640141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331 + ... + 5233.

It is an arithmetic number, because the mean of its divisors is an integer number (1390284).

Almost surely, 2^13640146 is an apocalyptic number.

13640146 is a deficient number, since it is larger than the sum of its proper divisors (8604398).

13640146 is a wasteful number, since it uses less digits than its factorization.

13640146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5025.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 13640146 is about 3693.2568283292. The cubic root of 13640146 is about 238.9312781298.

Adding to 13640146 its reverse (64104631), we get a palindrome (77744777).

The spelling of 13640146 in words is "thirteen million, six hundred forty thousand, one hundred forty-six".