249385 has 4 divisors (see below), whose sum is σ = 299268. Its totient is φ = 199504.

The previous prime is 249383. The next prime is 249397. The reversal of 249385 is 583942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583942 = 2 ⋅291971.

It can be written as a sum of positive squares in 2 ways, for example, as 36864 + 212521 = 192^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 249385 - 2¹ = 249383 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 4⁸ + 3¹¹ + 9⁴ + 8 + 5 .

It is a Duffinian number.

249385 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (249383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24934 + ... + 24943.

It is an arithmetic number, because the mean of its divisors is an integer number (74817).

2²⁴⁹³⁸⁵ is an apocalyptic number.

It is an amenable number.

249385 is a deficient number, since it is larger than the sum of its proper divisors (49883).

249385 is an equidigital number, since it uses as much as digits as its factorization.

249385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49882.

The product of its digits is 8640, while the sum is 31.

The square root of 249385 is about 499.3846213091. The cubic root of 249385 is about 62.9443533152.

It can be divided in two parts, 24 and 9385, that added together give a square (9409 = 97²).

The spelling of 249385 in words is "two hundred forty-nine thousand, three hundred eighty-five".