257199 has 4 divisors (see below), whose sum is σ = 342936. Its totient is φ = 171464.

The previous prime is 257189. The next prime is 257219. The reversal of 257199 is 991752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 257199 - 2⁹ = 256687 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257189) 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, 42864 + ... + 42869.

It is an arithmetic number, because the mean of its divisors is an integer number (85734).

2²⁵⁷¹⁹⁹ is an apocalyptic number.

257199 is a deficient number, since it is larger than the sum of its proper divisors (85737).

257199 is an equidigital number, since it uses as much as digits as its factorization.

257199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85736.

The product of its digits is 5670, while the sum is 33.

The square root of 257199 is about 507.1479074195. The cubic root of 257199 is about 63.5950176074.

The spelling of 257199 in words is "two hundred fifty-seven thousand, one hundred ninety-nine".