249499 has 2 divisors, whose sum is σ = 249500. Its totient is φ = 249498.

The previous prime is 249497. The next prime is 249503. The reversal of 249499 is 994942.

249499 is nontrivially palindromic in base 15.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 249499 - 2¹ = 249497 is a prime.

Together with 249497, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2¹⁷ + 4³ + 4⁴ + 9 + 9⁵ + 9⁵ .

It is not a weakly prime, because it can be changed into another prime (249497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124749 + 124750.

It is an arithmetic number, because the mean of its divisors is an integer number (124750).

2²⁴⁹⁴⁹⁹ is an apocalyptic number.

249499 is a deficient number, since it is larger than the sum of its proper divisors (1).

249499 is an equidigital number, since it uses as much as digits as its factorization.

249499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 249499 is about 499.4987487472. The cubic root of 249499 is about 62.9539429900.

It can be divided in two parts, 249 and 499, that multiplied together give a triangular number (124251 = T₄₉₈).

The spelling of 249499 in words is "two hundred forty-nine thousand, four hundred ninety-nine".