249015 has 16 divisors (see below), whose sum is σ = 429408. Its totient is φ = 122496.

The previous prime is 248987. The next prime is 249017. The reversal of 249015 is 510942.

249015 = T₅₃ + T₅₄ + ... + T₁₁₇.

It is not a de Polignac number, because 249015 - 2⁷ = 248887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 248982 and 249000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444 + ... + 833.

It is an arithmetic number, because the mean of its divisors is an integer number (26838).

2²⁴⁹⁰¹⁵ is an apocalyptic number.

249015 is a deficient number, since it is larger than the sum of its proper divisors (180393).

249015 is a wasteful number, since it uses less digits than its factorization.

249015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 249015 is about 499.0140278589. The cubic root of 249015 is about 62.9132087823.

Adding to 249015 its reverse (510942), we get a palindrome (759957).

The spelling of 249015 in words is "two hundred forty-nine thousand, fifteen".