245439 has 6 divisors (see below), whose sum is σ = 354536. Its totient is φ = 163620.

The previous prime is 245437. The next prime is 245471. The reversal of 245439 is 934542.

245439 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 245439 - 2¹ = 245437 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 4³ + 4⁷ + 5⁷ + 3¹⁰ + 9⁵ .

It is a Duffinian number.

245439 is strictly pandigital in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13627 + ... + 13644.

2²⁴⁵⁴³⁹ is an apocalyptic number.

245439 is a deficient number, since it is larger than the sum of its proper divisors (109097).

245439 is a wasteful number, since it uses less digits than its factorization.

245439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27277 (or 27274 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 245439 is about 495.4180053248. The cubic root of 245439 is about 62.6105988376.

The spelling of 245439 in words is "two hundred forty-five thousand, four hundred thirty-nine".