245646 has 16 divisors (see below), whose sum is σ = 546000. Its totient is φ = 81864.

The previous prime is 245639. The next prime is 245653. The reversal of 245646 is 646542.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (245639) and next prime (245653).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 7 ways as a sum of consecutive naturals, for example, 2221 + ... + 2328.

It is an arithmetic number, because the mean of its divisors is an integer number (34125).

2²⁴⁵⁶⁴⁶ is an apocalyptic number.

245646 is an abundant number, since it is smaller than the sum of its proper divisors (300354).

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

245646 is a wasteful number, since it uses less digits than its factorization.

245646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4560 (or 4554 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 245646 is about 495.6268757846. The cubic root of 245646 is about 62.6281955413.

The spelling of 245646 in words is "two hundred forty-five thousand, six hundred forty-six".