13668542 has 4 divisors (see below), whose sum is σ = 20502816. Its totient is φ = 6834270.

The previous prime is 13668521. The next prime is 13668547. The reversal of 13668542 is 24586631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24586631 = 659 ⋅37309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13668547) 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 as a sum of consecutive naturals, namely, 3417134 + ... + 3417137.

It is an arithmetic number, because the mean of its divisors is an integer number (5125704).

Almost surely, 2^13668542 is an apocalyptic number.

13668542 is a deficient number, since it is larger than the sum of its proper divisors (6834274).

13668542 is an equidigital number, since it uses as much as digits as its factorization.

13668542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834273.

The product of its digits is 34560, while the sum is 35.

The square root of 13668542 is about 3697.0991331042. The cubic root of 13668542 is about 239.0969652589.

The spelling of 13668542 in words is "thirteen million, six hundred sixty-eight thousand, five hundred forty-two".