14139857 has 4 divisors (see below), whose sum is σ = 14884080. Its totient is φ = 13395636.

The previous prime is 14139847. The next prime is 14139859. The reversal of 14139857 is 75893141.

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 14139857 - 2⁴ = 14139841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 14139857.

It is not an unprimeable number, because it can be changed into a prime (14139859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 372083 + ... + 372120.

It is an arithmetic number, because the mean of its divisors is an integer number (3721020).

Almost surely, 2^14139857 is an apocalyptic number.

It is an amenable number.

14139857 is a deficient number, since it is larger than the sum of its proper divisors (744223).

14139857 is an equidigital number, since it uses as much as digits as its factorization.

14139857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744222.

The product of its digits is 30240, while the sum is 38.

The square root of 14139857 is about 3760.3001210010. The cubic root of 14139857 is about 241.8141288420.

The spelling of 14139857 in words is "fourteen million, one hundred thirty-nine thousand, eight hundred fifty-seven".