245977 has 2 divisors, whose sum is σ = 245978. Its totient is φ = 245976.

The previous prime is 245963. The next prime is 245981. The reversal of 245977 is 779542.

245977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197136 + 48841 = 444^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 245977 - 2⁷ = 245849 is a prime.

It is a nialpdrome in base 12.

It is not a weakly prime, because it can be changed into another prime (245177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122988 + 122989.

It is an arithmetic number, because the mean of its divisors is an integer number (122989).

2²⁴⁵⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

245977 is a deficient number, since it is larger than the sum of its proper divisors (1).

245977 is an equidigital number, since it uses as much as digits as its factorization.

245977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17640, while the sum is 34.

The square root of 245977 is about 495.9606839257. The cubic root of 245977 is about 62.6563127353.

The spelling of 245977 in words is "two hundred forty-five thousand, nine hundred seventy-seven".