245566 has 8 divisors (see below), whose sum is σ = 370800. Its totient is φ = 121968.

The previous prime is 245563. The next prime is 245587. The reversal of 245566 is 665542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (46350).

2²⁴⁵⁵⁶⁶ is an apocalyptic number.

245566 is a deficient number, since it is larger than the sum of its proper divisors (125234).

245566 is a wasteful number, since it uses less digits than its factorization.

245566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818.

The product of its digits is 7200, while the sum is 28.

The square root of 245566 is about 495.5461633390. The cubic root of 245566 is about 62.6213960553.

The spelling of 245566 in words is "two hundred forty-five thousand, five hundred sixty-six".