14207857 has 4 divisors (see below), whose sum is σ = 14379120. Its totient is φ = 14036596.

The previous prime is 14207821. The next prime is 14207873. The reversal of 14207857 is 75870241.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75870241 = 661 ⋅114781.

It is a cyclic number.

It is not a de Polignac number, because 14207857 - 2¹⁵ = 14175089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14207807) 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, 85507 + ... + 85672.

It is an arithmetic number, because the mean of its divisors is an integer number (3594780).

Almost surely, 2^14207857 is an apocalyptic number.

It is an amenable number.

14207857 is a deficient number, since it is larger than the sum of its proper divisors (171263).

14207857 is an equidigital number, since it uses as much as digits as its factorization.

14207857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171262.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 14207857 is about 3769.3311077697. The cubic root of 14207857 is about 242.2011452902.

The spelling of 14207857 in words is "fourteen million, two hundred seven thousand, eight hundred fifty-seven".