385261 has 2 divisors, whose sum is σ = 385262. Its totient is φ = 385260.

The previous prime is 385249. The next prime is 385267. The reversal of 385261 is 162583.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240100 + 145161 = 490^2 + 381^2 .

It is a cyclic number.

It is not a de Polignac number, because 385261 - 2¹⁵ = 352493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192630 + 192631.

It is an arithmetic number, because the mean of its divisors is an integer number (192631).

2³⁸⁵²⁶¹ is an apocalyptic number.

It is an amenable number.

385261 is a deficient number, since it is larger than the sum of its proper divisors (1).

385261 is an equidigital number, since it uses as much as digits as its factorization.

385261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 385261 is about 620.6939664601. The cubic root of 385261 is about 72.7642989021.

It can be divided in two parts, 385 and 261, that added together give a palindrome (646).

The spelling of 385261 in words is "three hundred eighty-five thousand, two hundred sixty-one".