249023 has 8 divisors (see below), whose sum is σ = 266880. Its totient is φ = 231840.

The previous prime is 249017. The next prime is 249037. The reversal of 249023 is 320942.

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 249023 - 2¹⁰ = 247999 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 248986 and 249004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 761 + ... + 1037.

It is an arithmetic number, because the mean of its divisors is an integer number (33360).

2²⁴⁹⁰²³ is an apocalyptic number.

249023 is a deficient number, since it is larger than the sum of its proper divisors (17857).

249023 is a wasteful number, since it uses less digits than its factorization.

249023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 249023 is about 499.0220436013. The cubic root of 249023 is about 62.9138825038.

Adding to 249023 its reverse (320942), we get a palindrome (569965).

The spelling of 249023 in words is "two hundred forty-nine thousand, twenty-three".