245121241 has 12 divisors (see below), whose sum is σ = 252208684. Its totient is φ = 238161600.

The previous prime is 245121229. The next prime is 245121257. The reversal of 245121241 is 142121542.

It can be written as a sum of positive squares in 6 ways, for example, as 190302025 + 54819216 = 13795^2 + 7404^2 .

It is a de Polignac number, because none of the positive numbers 2^k-245121241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245121941) 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 11 ways as a sum of consecutive naturals, for example, 1354171 + ... + 1354351.

Almost surely, 2^245121241 is an apocalyptic number.

It is an amenable number.

245121241 is a deficient number, since it is larger than the sum of its proper divisors (7087443).

245121241 is an equidigital number, since it uses as much as digits as its factorization.

245121241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 391 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 245121241 is about 15656.3482651607. The cubic root of 245121241 is about 625.8356744591.

Adding to 245121241 its reverse (142121542), we get a palindrome (387242783).

The spelling of 245121241 in words is "two hundred forty-five million, one hundred twenty-one thousand, two hundred forty-one".