249491 has 8 divisors (see below), whose sum is σ = 279984. Its totient is φ = 220320.

The previous prime is 249463. The next prime is 249497. The reversal of 249491 is 194942.

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 249491 - 2⁶ = 249427 is a prime.

It is a super-3 number, since 3×249491³ = 46589270036633313, which contains 333 as substring.

It is a d-powerful number, because it can be written as 2¹⁷ + 4³ + 4⁴ + 9⁵ + 9⁵ + 1 .

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 249491.

It is not an unprimeable number, because it can be changed into a prime (249497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101 + ... + 713.

It is an arithmetic number, because the mean of its divisors is an integer number (34998).

2²⁴⁹⁴⁹¹ is an apocalyptic number.

249491 is a deficient number, since it is larger than the sum of its proper divisors (30493).

249491 is a wasteful number, since it uses less digits than its factorization.

249491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661.

The product of its digits is 2592, while the sum is 29.

The square root of 249491 is about 499.4907406549. The cubic root of 249491 is about 62.9532701257.

The spelling of 249491 in words is "two hundred forty-nine thousand, four hundred ninety-one".