14157681 has 4 divisors (see below), whose sum is σ = 18876912. Its totient is φ = 9438452.

The previous prime is 14157677. The next prime is 14157697. The reversal of 14157681 is 18675141.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 14157681 - 2² = 14157677 is a prime.

It is a super-2 number, since 2×14157681² = 400879862595522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (14157631) 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 3 ways as a sum of consecutive naturals, for example, 2359611 + ... + 2359616.

It is an arithmetic number, because the mean of its divisors is an integer number (4719228).

Almost surely, 2^14157681 is an apocalyptic number.

It is an amenable number.

14157681 is a deficient number, since it is larger than the sum of its proper divisors (4719231).

14157681 is an equidigital number, since it uses as much as digits as its factorization.

14157681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4719230.

The product of its digits is 6720, while the sum is 33.

The square root of 14157681 is about 3762.6693981800. The cubic root of 14157681 is about 241.9156924639.

The spelling of 14157681 in words is "fourteen million, one hundred fifty-seven thousand, six hundred eighty-one".