257043 has 8 divisors (see below), whose sum is σ = 350208. Its totient is φ = 167624.

The previous prime is 257017. The next prime is 257053. The reversal of 257043 is 340752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257043 - 2¹⁰ = 256019 is a prime.

It is a super-2 number, since 2×257043² = 132142207698, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257003) 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, 771 + ... + 1052.

It is an arithmetic number, because the mean of its divisors is an integer number (43776).

2²⁵⁷⁰⁴³ is an apocalyptic number.

257043 is a deficient number, since it is larger than the sum of its proper divisors (93165).

257043 is a wasteful number, since it uses less digits than its factorization.

257043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873.

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 257043 is about 506.9940828057. The cubic root of 257043 is about 63.5821574885.

Adding to 257043 its reverse (340752), we get a palindrome (597795).

The spelling of 257043 in words is "two hundred fifty-seven thousand, forty-three".