257611 has 2 divisors, whose sum is σ = 257612. Its totient is φ = 257610.

The previous prime is 257591. The next prime is 257627. The reversal of 257611 is 116752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257611 - 2⁹ = 257099 is a prime.

It is not a weakly prime, because it can be changed into another prime (257671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128805 + 128806.

It is an arithmetic number, because the mean of its divisors is an integer number (128806).

2²⁵⁷⁶¹¹ is an apocalyptic number.

257611 is a deficient number, since it is larger than the sum of its proper divisors (1).

257611 is an equidigital number, since it uses as much as digits as its factorization.

257611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 420, while the sum is 22.

The square root of 257611 is about 507.5539380204. The cubic root of 257611 is about 63.6289565281.

It can be divided in two parts, 257 and 611, that added together give a palindrome (868).

The spelling of 257611 in words is "two hundred fifty-seven thousand, six hundred eleven".