245816 has 8 divisors (see below), whose sum is σ = 460920. Its totient is φ = 122904.

The previous prime is 245789. The next prime is 245821. The reversal of 245816 is 618542.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

245816 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15356 + ... + 15371.

It is an arithmetic number, because the mean of its divisors is an integer number (57615).

2²⁴⁵⁸¹⁶ is an apocalyptic number.

It is an amenable number.

245816 is a deficient number, since it is larger than the sum of its proper divisors (215104).

245816 is a wasteful number, since it uses less digits than its factorization.

245816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30733 (or 30729 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 245816 is about 495.7983461045. The cubic root of 245816 is about 62.6426395490.

The spelling of 245816 in words is "two hundred forty-five thousand, eight hundred sixteen".