249591 has 8 divisors (see below), whose sum is σ = 335104. Its totient is φ = 165240.

The previous prime is 249589. The next prime is 249593. The reversal of 249591 is 195942.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (249589) and next prime (249593).

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

It is not a de Polignac number, because 249591 - 2¹ = 249589 is a prime.

It is a Duffinian number.

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 249591.

It is not an unprimeable number, because it can be changed into a prime (249593) 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, 660 + ... + 966.

It is an arithmetic number, because the mean of its divisors is an integer number (41888).

2²⁴⁹⁵⁹¹ is an apocalyptic number.

249591 is a deficient number, since it is larger than the sum of its proper divisors (85513).

249591 is a wasteful number, since it uses less digits than its factorization.

249591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

The product of its digits is 3240, while the sum is 30.

The square root of 249591 is about 499.5908325820. The cubic root of 249591 is about 62.9616798961.

The spelling of 249591 in words is "two hundred forty-nine thousand, five hundred ninety-one".