245978 has 8 divisors (see below), whose sum is σ = 381780. Its totient is φ = 118720.

The previous prime is 245977. The next prime is 245981. The reversal of 245978 is 879542.

It is a happy number.

245978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 218089 + 27889 = 467^2 + 167^2 .

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

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (245977) 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, 2063 + ... + 2178.

2²⁴⁵⁹⁷⁸ is an apocalyptic number.

245978 is a deficient number, since it is larger than the sum of its proper divisors (135802).

245978 is a wasteful number, since it uses less digits than its factorization.

245978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272.

The product of its digits is 20160, while the sum is 35.

The square root of 245978 is about 495.9616920691. The cubic root of 245978 is about 62.6563976433.

The spelling of 245978 in words is "two hundred forty-five thousand, nine hundred seventy-eight".