245405057 has 2 divisors, whose sum is σ = 245405058. Its totient is φ = 245405056.

The previous prime is 245405029. The next prime is 245405059. The reversal of 245405057 is 750504542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209931121 + 35473936 = 14489^2 + 5956^2 .

It is a cyclic number.

It is not a de Polignac number, because 245405057 - 2¹⁴ = 245388673 is a prime.

Together with 245405059, 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 (245405059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122702528 + 122702529.

It is an arithmetic number, because the mean of its divisors is an integer number (122702529).

Almost surely, 2^245405057 is an apocalyptic number.

It is an amenable number.

245405057 is a deficient number, since it is larger than the sum of its proper divisors (1).

245405057 is an equidigital number, since it uses as much as digits as its factorization.

245405057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 245405057 is about 15665.4095701325. The cubic root of 245405057 is about 626.0771245911.

Adding to 245405057 its reverse (750504542), we get a palindrome (995909599).

The spelling of 245405057 in words is "two hundred forty-five million, four hundred five thousand, fifty-seven".