13640126 has 16 divisors (see below), whose sum is σ = 21062160. Its totient is φ = 6621120.

The previous prime is 13640111. The next prime is 13640129. The reversal of 13640126 is 62104631.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13640129) 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, 32345 + ... + 32763.

It is an arithmetic number, because the mean of its divisors is an integer number (1316385).

Almost surely, 2^13640126 is an apocalyptic number.

13640126 is a deficient number, since it is larger than the sum of its proper divisors (7422034).

13640126 is a wasteful number, since it uses less digits than its factorization.

13640126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 13640126 is about 3693.2541206909. The cubic root of 13640126 is about 238.9311613513.

Adding to 13640126 its reverse (62104631), we get a palindrome (75744757).

The spelling of 13640126 in words is "thirteen million, six hundred forty thousand, one hundred twenty-six".