245686 has 24 divisors (see below), whose sum is σ = 451440. Its totient is φ = 99792.

The previous prime is 245683. The next prime is 245711. The reversal of 245686 is 686542.

It is a super-2 number, since 2×245686² = 120723221192, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245681) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2200 + ... + 2308.

It is an arithmetic number, because the mean of its divisors is an integer number (18810).

2²⁴⁵⁶⁸⁶ is an apocalyptic number.

245686 is a deficient number, since it is larger than the sum of its proper divisors (205754).

245686 is a wasteful number, since it uses less digits than its factorization.

245686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 141 counting only the distinct ones).

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

The square root of 245686 is about 495.6672270788. The cubic root of 245686 is about 62.6315947308.

The spelling of 245686 in words is "two hundred forty-five thousand, six hundred eighty-six".