257230 has 16 divisors (see below), whose sum is σ = 479520. Its totient is φ = 99232.

The previous prime is 257221. The next prime is 257239. The reversal of 257230 is 32752.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (257221) and next prime (257239).

It is a junction number, because it is equal to n+sod(n) for n = 257198 and 257207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (29970).

2²⁵⁷²³⁰ is an apocalyptic number.

257230 is a deficient number, since it is larger than the sum of its proper divisors (222290).

257230 is a wasteful number, since it uses less digits than its factorization.

257230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 257230 is about 507.1784695746. The cubic root of 257230 is about 63.5975725245.

Adding to 257230 its reverse (32752), we get a palindrome (289982).

The spelling of 257230 in words is "two hundred fifty-seven thousand, two hundred thirty".