249071 has 4 divisors (see below), whose sum is σ = 262200. Its totient is φ = 235944.

The previous prime is 249059. The next prime is 249079. The reversal of 249071 is 170942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249071 is a prime.

It is a plaindrome in base 14 and base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249071.

It is not an unprimeable number, because it can be changed into a prime (249079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6536 + ... + 6573.

It is an arithmetic number, because the mean of its divisors is an integer number (65550).

2²⁴⁹⁰⁷¹ is an apocalyptic number.

249071 is a deficient number, since it is larger than the sum of its proper divisors (13129).

249071 is a wasteful number, since it uses less digits than its factorization.

249071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13128.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 249071 is about 499.0701353517. The cubic root of 249071 is about 62.9179245298.

The spelling of 249071 in words is "two hundred forty-nine thousand, seventy-one".