249365 has 8 divisors (see below), whose sum is σ = 305208. Its totient is φ = 195520.

The previous prime is 249341. The next prime is 249367. The reversal of 249365 is 563942.

It can be written as a sum of positive squares in 4 ways, for example, as 56644 + 192721 = 238^2 + 439^2 .

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

It is not a de Polignac number, because 249365 - 2¹² = 245269 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 4³ + 3¹⁰ + 9⁵ + 6 + 5³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249367) 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, 206 + ... + 735.

It is an arithmetic number, because the mean of its divisors is an integer number (38151).

2²⁴⁹³⁶⁵ is an apocalyptic number.

It is an amenable number.

249365 is a deficient number, since it is larger than the sum of its proper divisors (55843).

249365 is an equidigital number, since it uses as much as digits as its factorization.

249365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999.

The product of its digits is 6480, while the sum is 29.

The square root of 249365 is about 499.3645962621. The cubic root of 249365 is about 62.9426706148.

The spelling of 249365 in words is "two hundred forty-nine thousand, three hundred sixty-five".