245866 has 8 divisors (see below), whose sum is σ = 370980. Its totient is φ = 122208.

The previous prime is 245863. The next prime is 245881. The reversal of 245866 is 668542.

It can be written as a sum of positive squares in 2 ways, for example, as 245025 + 841 = 495^2 + 29^2 .

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

It is not an unprimeable number, because it can be changed into a prime (245863) 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, 310 + ... + 766.

2²⁴⁵⁸⁶⁶ is an apocalyptic number.

245866 is a deficient number, since it is larger than the sum of its proper divisors (125114).

245866 is a wasteful number, since it uses less digits than its factorization.

245866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its digits is 11520, while the sum is 31.

The square root of 245866 is about 495.8487672668. The cubic root of 245866 is about 62.6468865192.

It can be divided in two parts, 245 and 866, that added together give a palindrome (1111).

The spelling of 245866 in words is "two hundred forty-five thousand, eight hundred sixty-six".