249547 has 4 divisors (see below), whose sum is σ = 250776. Its totient is φ = 248320.

The previous prime is 249541. The next prime is 249563. The reversal of 249547 is 745942.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 745942 = 2 ⋅372971.

It is a cyclic number.

It is not a de Polignac number, because 249547 - 2³ = 249539 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

249547 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (249541) 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, 229 + ... + 742.

It is an arithmetic number, because the mean of its divisors is an integer number (62694).

2²⁴⁹⁵⁴⁷ is an apocalyptic number.

249547 is a deficient number, since it is larger than the sum of its proper divisors (1229).

249547 is an equidigital number, since it uses as much as digits as its factorization.

249547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228.

The product of its digits is 10080, while the sum is 31.

The square root of 249547 is about 499.5467946049. The cubic root of 249547 is about 62.9579798739.

The spelling of 249547 in words is "two hundred forty-nine thousand, five hundred forty-seven".