245240641 has 2 divisors, whose sum is σ = 245240642. Its totient is φ = 245240640.

The previous prime is 245240627. The next prime is 245240663. The reversal of 245240641 is 146042542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245235600 + 5041 = 15660^2 + 71^2 .

It is a cyclic number.

It is not a de Polignac number, because 245240641 - 2⁵ = 245240609 is a prime.

It is not a weakly prime, because it can be changed into another prime (245240141) 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 as a sum of consecutive naturals, namely, 122620320 + 122620321.

It is an arithmetic number, because the mean of its divisors is an integer number (122620321).

Almost surely, 2^245240641 is an apocalyptic number.

It is an amenable number.

245240641 is a deficient number, since it is larger than the sum of its proper divisors (1).

245240641 is an equidigital number, since it uses as much as digits as its factorization.

245240641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 245240641 is about 15660.1609506416. The cubic root of 245240641 is about 625.9372740452.

The spelling of 245240641 in words is "two hundred forty-five million, two hundred forty thousand, six hundred forty-one".