385291 has 2 divisors, whose sum is σ = 385292. Its totient is φ = 385290.

The previous prime is 385289. The next prime is 385321. The reversal of 385291 is 192583.

It is a weak prime.

It is an emirp because it is prime and its reverse (192583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385291 - 2¹ = 385289 is a prime.

Together with 385289, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

385291 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (385261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192645 + 192646.

It is an arithmetic number, because the mean of its divisors is an integer number (192646).

2³⁸⁵²⁹¹ is an apocalyptic number.

385291 is a deficient number, since it is larger than the sum of its proper divisors (1).

385291 is an equidigital number, since it uses as much as digits as its factorization.

385291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 385291 is about 620.7181324885. The cubic root of 385291 is about 72.7661875545.

It can be divided in two parts, 385 and 291, that added together give a palindrome (676).

The spelling of 385291 in words is "three hundred eighty-five thousand, two hundred ninety-one".