249471 has 12 divisors (see below), whose sum is σ = 367848. Its totient is φ = 162864.

The previous prime is 249463. The next prime is 249497. The reversal of 249471 is 174942.

It is a happy number.

It is not a de Polignac number, because 249471 - 2³ = 249463 is a prime.

It is a super-3 number, since 3×249471³ = 46578066698142333, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2¹⁷ + 4 + 4² + 9³ + 7⁶ + 1 .

It is a zygodrome in base 2.

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 249471.

It is not an unprimeable number, because it can be changed into a prime (249421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216 + ... + 738.

It is an arithmetic number, because the mean of its divisors is an integer number (30654).

2²⁴⁹⁴⁷¹ is an apocalyptic number.

249471 is a deficient number, since it is larger than the sum of its proper divisors (118377).

249471 is a wasteful number, since it uses less digits than its factorization.

249471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 579 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 249471 is about 499.4707198625. The cubic root of 249471 is about 62.9515879019.

Subtracting from 249471 its reverse (174942), we obtain a square (74529 = 273²).

The spelling of 249471 in words is "two hundred forty-nine thousand, four hundred seventy-one".