245897 has 2 divisors, whose sum is σ = 245898.
Its totient is φ = 245896.
The previous prime is 245881. The next prime is 245899. The reversal of 245897 is 798542.
It is a happy number.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 226576 + 19321 = 476^2 + 139^2
It is a cyclic number.
It is not a de Polignac number, because 245897 - 24 = 245881 is a prime.
Together with 245899, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (245899) by changing a digit.
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, 122948 + 122949.
It is an arithmetic number, because the mean of its divisors is an integer number (122949).
2245897 is an apocalyptic number.
It is an amenable number.
245897 is a deficient number, since it is larger than the sum of its proper divisors (1).
245897 is an equidigital number, since it uses as much as digits as its factorization.
245897 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 20160, while the sum is 35.
The square root of 245897 is about 495.8800258127.
The cubic root of 245897 is about 62.6495193515.
The spelling of 245897 in words is "two hundred forty-five thousand, eight hundred ninety-seven".