245765123 has 2 divisors, whose sum is σ = 245765124. Its totient is φ = 245765122.

The previous prime is 245765119. The next prime is 245765159. The reversal of 245765123 is 321567542.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 245765123 - 2² = 245765119 is a prime.

It is not a weakly prime, because it can be changed into another prime (245765423) 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, 122882561 + 122882562.

It is an arithmetic number, because the mean of its divisors is an integer number (122882562).

Almost surely, 2^245765123 is an apocalyptic number.

245765123 is a deficient number, since it is larger than the sum of its proper divisors (1).

245765123 is an equidigital number, since it uses as much as digits as its factorization.

245765123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 35.

The square root of 245765123 is about 15676.8977479602. The cubic root of 245765123 is about 626.3831749585.

The spelling of 245765123 in words is "two hundred forty-five million, seven hundred sixty-five thousand, one hundred twenty-three".