245445321 has 32 divisors (see below), whose sum is σ = 374132736. Its totient is φ = 141768000.

The previous prime is 245445301. The next prime is 245445323. The reversal of 245445321 is 123544542.

It is not a de Polignac number, because 245445321 - 2⁵ = 245445289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245445323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66751 + ... + 70331.

It is an arithmetic number, because the mean of its divisors is an integer number (11691648).

Almost surely, 2^245445321 is an apocalyptic number.

It is an amenable number.

245445321 is a deficient number, since it is larger than the sum of its proper divisors (128687415).

245445321 is a wasteful number, since it uses less digits than its factorization.

245445321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693.

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

The square root of 245445321 is about 15666.6946418190. The cubic root of 245445321 is about 626.1113632102. Note that the first 3 decimals are identical.

Adding to 245445321 its reverse (123544542), we get a palindrome (368989863).

The spelling of 245445321 in words is "two hundred forty-five million, four hundred forty-five thousand, three hundred twenty-one".