257244 has 48 divisors (see below), whose sum is σ = 691488. Its totient is φ = 73728.

The previous prime is 257239. The next prime is 257249. The reversal of 257244 is 442752.

It is an interprime number because it is at equal distance from previous prime (257239) and next prime (257249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257249) by changing a digit.

257244 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2604 + ... + 2700.

It is an arithmetic number, because the mean of its divisors is an integer number (14406).

2²⁵⁷²⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345744).

257244 is an abundant number, since it is smaller than the sum of its proper divisors (434244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257244 is a wasteful number, since it uses less digits than its factorization.

257244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 132 counting only the distinct ones).

The product of its digits is 2240, while the sum is 24.

The square root of 257244 is about 507.1922712345. The cubic root of 257244 is about 63.5987262907.

Adding to 257244 its reverse (442752), we get a palindrome (699996).

The spelling of 257244 in words is "two hundred fifty-seven thousand, two hundred forty-four".