249447 has 8 divisors (see below), whose sum is σ = 362880. Its totient is φ = 151160.

The previous prime is 249439. The next prime is 249449. The reversal of 249447 is 744942.

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

It is a cyclic number.

It is not a de Polignac number, because 249447 - 2³ = 249439 is a prime.

249447 is a lucky number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249449) 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, 3747 + ... + 3812.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2²⁴⁹⁴⁴⁷ is an apocalyptic number.

249447 is a deficient number, since it is larger than the sum of its proper divisors (113433).

249447 is a wasteful number, since it uses less digits than its factorization.

249447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7573.

The product of its digits is 8064, while the sum is 30.

The square root of 249447 is about 499.4466938523. The cubic root of 249447 is about 62.9495691148.

It can be divided in two parts, 249 and 447, that added together give a palindrome (696).

The spelling of 249447 in words is "two hundred forty-nine thousand, four hundred forty-seven".