257095 has 4 divisors (see below), whose sum is σ = 308520. Its totient is φ = 205672.

The previous prime is 257093. The next prime is 257099. The reversal of 257095 is 590752.

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 257095 - 2¹ = 257093 is a prime.

257095 is a lucky number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257093) 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, 25705 + ... + 25714.

It is an arithmetic number, because the mean of its divisors is an integer number (77130).

2²⁵⁷⁰⁹⁵ is an apocalyptic number.

257095 is a deficient number, since it is larger than the sum of its proper divisors (51425).

257095 is an equidigital number, since it uses as much as digits as its factorization.

257095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51424.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 257095 is about 507.0453628621. The cubic root of 257095 is about 63.5864447728.

The spelling of 257095 in words is "two hundred fifty-seven thousand, ninety-five".