245305145 has 4 divisors (see below), whose sum is σ = 294366180. Its totient is φ = 196244112.

The previous prime is 245305133. The next prime is 245305163. The reversal of 245305145 is 541503542.

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 46607929 + 198697216 = 6827^2 + 14096^2 .

It is a cyclic number.

It is not a de Polignac number, because 245305145 - 2²² = 241110841 is a prime.

It is a super-2 number, since 2×245305145² = 120349228326942050, which contains 22 as substring.

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, 24530510 + ... + 24530519.

It is an arithmetic number, because the mean of its divisors is an integer number (73591545).

Almost surely, 2^245305145 is an apocalyptic number.

It is an amenable number.

245305145 is a deficient number, since it is larger than the sum of its proper divisors (49061035).

245305145 is an equidigital number, since it uses as much as digits as its factorization.

245305145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49061034.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 245305145 is about 15662.2203087557. The cubic root of 245305145 is about 625.9921479279.

Adding to 245305145 its reverse (541503542), we get a palindrome (786808687).

The spelling of 245305145 in words is "two hundred forty-five million, three hundred five thousand, one hundred forty-five".