13906642 has 16 divisors (see below), whose sum is σ = 21415680. Its totient is φ = 6769728.

The previous prime is 13906639. The next prime is 13906643. The reversal of 13906642 is 24660931.

It is not an unprimeable number, because it can be changed into a prime (13906643) 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, 31459 + ... + 31897.

It is an arithmetic number, because the mean of its divisors is an integer number (1338480).

Almost surely, 2^13906642 is an apocalyptic number.

13906642 is a deficient number, since it is larger than the sum of its proper divisors (7509038).

13906642 is a wasteful number, since it uses less digits than its factorization.

13906642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 13906642 is about 3729.1610316531. The cubic root of 13906642 is about 240.4773024454.

The spelling of 13906642 in words is "thirteen million, nine hundred six thousand, six hundred forty-two".