257126 has 4 divisors (see below), whose sum is σ = 385692. Its totient is φ = 128562.

The previous prime is 257123. The next prime is 257141. The reversal of 257126 is 621752.

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

It is a super-2 number, since 2×257126² = 132227559752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257123) 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 as a sum of consecutive naturals, namely, 64280 + ... + 64283.

It is an arithmetic number, because the mean of its divisors is an integer number (96423).

2²⁵⁷¹²⁶ is an apocalyptic number.

257126 is a deficient number, since it is larger than the sum of its proper divisors (128566).

257126 is a wasteful number, since it uses less digits than its factorization.

257126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128565.

The product of its digits is 840, while the sum is 23.

The square root of 257126 is about 507.0759311977. The cubic root of 257126 is about 63.5890003788.

Adding to 257126 its reverse (621752), we get a palindrome (878878).

It can be divided in two parts, 257 and 126, that added together give a palindrome (383).

The spelling of 257126 in words is "two hundred fifty-seven thousand, one hundred twenty-six".