245020345 has 4 divisors (see below), whose sum is σ = 294024420. Its totient is φ = 196016272.

The previous prime is 245020313. The next prime is 245020367. The reversal of 245020345 is 543020542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74874409 + 170145936 = 8653^2 + 13044^2 .

It is a cyclic number.

It is not a de Polignac number, because 245020345 - 2⁵ = 245020313 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24502030 + ... + 24502039.

It is an arithmetic number, because the mean of its divisors is an integer number (73506105).

Almost surely, 2^245020345 is an apocalyptic number.

It is an amenable number.

245020345 is a deficient number, since it is larger than the sum of its proper divisors (49004075).

245020345 is an equidigital number, since it uses as much as digits as its factorization.

245020345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49004074.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 245020345 is about 15653.1257261928. The cubic root of 245020345 is about 625.7497945333.

Adding to 245020345 its reverse (543020542), we get a palindrome (788040887).

The spelling of 245020345 in words is "two hundred forty-five million, twenty thousand, three hundred forty-five".