245245 has 32 divisors (see below), whose sum is σ = 403200. Its totient is φ = 141120.

The previous prime is 245209. The next prime is 245251. The reversal of 245245 is 542542.

It is not a de Polignac number, because 245245 - 2⁹ = 244733 is a prime.

It is a super-2 number, since 2×245245² = 120290220050, which contains 22 as substring.

It is an Ulam number.

Its product of digits (1600) is a multiple of the sum of its prime factors (50).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18859 + ... + 18871.

It is an arithmetic number, because the mean of its divisors is an integer number (12600).

2²⁴⁵²⁴⁵ is an apocalyptic number.

It is an amenable number.

245245 is a deficient number, since it is larger than the sum of its proper divisors (157955).

245245 is a wasteful number, since it uses less digits than its factorization.

245245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50 (or 36 counting only the distinct ones).

The product of its digits is 1600, while the sum is 22.

The square root of 245245 is about 495.2221723631. Note that the first 3 decimals coincide. The cubic root of 245245 is about 62.5940982572.

Adding to 245245 its reverse (542542), we get a palindrome (787787).

The spelling of 245245 in words is "two hundred forty-five thousand, two hundred forty-five".