257135 has 4 divisors (see below), whose sum is σ = 308568. Its totient is φ = 205704.

The previous prime is 257123. The next prime is 257141. The reversal of 257135 is 531752.

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 257135 - 2¹⁶ = 191599 is a prime.

It is a super-2 number, since 2×257135² = 132236816450, which contains 22 as substring.

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 257135.

It is a congruent number.

It is an unprimeable number.

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, 25709 + ... + 25718.

It is an arithmetic number, because the mean of its divisors is an integer number (77142).

2²⁵⁷¹³⁵ is an apocalyptic number.

257135 is a deficient number, since it is larger than the sum of its proper divisors (51433).

257135 is an equidigital number, since it uses as much as digits as its factorization.

257135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51432.

The product of its digits is 1050, while the sum is 23.

The square root of 257135 is about 507.0848055306. The cubic root of 257135 is about 63.5897422904.

Adding to 257135 its reverse (531752), we get a palindrome (788887).

The spelling of 257135 in words is "two hundred fifty-seven thousand, one hundred thirty-five".