245504321 has 8 divisors (see below), whose sum is σ = 254240424. Its totient is φ = 236920320.

The previous prime is 245504317. The next prime is 245504341. The reversal of 245504321 is 123405542.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22420225 + 223084096 = 4735^2 + 14936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245504321 - 2² = 245504317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245504341) 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 7 ways as a sum of consecutive naturals, for example, 34736 + ... + 41201.

It is an arithmetic number, because the mean of its divisors is an integer number (31780053).

Almost surely, 2^245504321 is an apocalyptic number.

It is an amenable number.

245504321 is a deficient number, since it is larger than the sum of its proper divisors (8736103).

245504321 is an equidigital number, since it uses as much as digits as its factorization.

245504321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76051.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 245504321 is about 15668.5775040365. The cubic root of 245504321 is about 626.1615272831.

Adding to 245504321 its reverse (123405542), we get a palindrome (368909863).

The spelling of 245504321 in words is "two hundred forty-five million, five hundred four thousand, three hundred twenty-one".