245240 has 16 divisors (see below), whose sum is σ = 551880. Its totient is φ = 98080.

The previous prime is 245209. The next prime is 245251. The reversal of 245240 is 42542.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3026 + ... + 3105.

2²⁴⁵²⁴⁰ is an apocalyptic number.

245240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245240 is an abundant number, since it is smaller than the sum of its proper divisors (306640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245240 is a wasteful number, since it uses less digits than its factorization.

245240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6142 (or 6138 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 245240 is about 495.2171240981. The cubic root of 245240 is about 62.5936728695.

Adding to 245240 its reverse (42542), we get a palindrome (287782).

The spelling of 245240 in words is "two hundred forty-five thousand, two hundred forty".