245445123 has 32 divisors (see below), whose sum is σ = 410222592. Its totient is φ = 126813600.

The previous prime is 245445107. The next prime is 245445127. The reversal of 245445123 is 321544542.

It is not a de Polignac number, because 245445123 - 2⁴ = 245445107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245445127) 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 in 31 ways as a sum of consecutive naturals, for example, 41340 + ... + 46902.

It is an arithmetic number, because the mean of its divisors is an integer number (12819456).

Almost surely, 2^245445123 is an apocalyptic number.

245445123 is a deficient number, since it is larger than the sum of its proper divisors (164777469).

245445123 is a wasteful number, since it uses less digits than its factorization.

245445123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5775.

The product of its digits is 19200, while the sum is 30.

The square root of 245445123 is about 15666.6883226801. The cubic root of 245445123 is about 626.1111948495. Note that the first 4 decimals are identical.

Adding to 245445123 its reverse (321544542), we get a palindrome (566989665).

The spelling of 245445123 in words is "two hundred forty-five million, four hundred forty-five thousand, one hundred twenty-three".