245136241 has 4 divisors (see below), whose sum is σ = 280155712. Its totient is φ = 210116772.

The previous prime is 245136197. The next prime is 245136259. The reversal of 245136241 is 142631542.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 245136241 - 2⁹ = 245135729 is a prime.

It is a super-4 number, since 4×245136241⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245136341) by changing a digit.

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, 17509725 + ... + 17509738.

It is an arithmetic number, because the mean of its divisors is an integer number (70038928).

Almost surely, 2^245136241 is an apocalyptic number.

It is an amenable number.

245136241 is a deficient number, since it is larger than the sum of its proper divisors (35019471).

245136241 is an equidigital number, since it uses as much as digits as its factorization.

245136241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35019470.

The product of its digits is 5760, while the sum is 28.

The square root of 245136241 is about 15656.8272967418. The cubic root of 245136241 is about 625.8484400380.

Adding to 245136241 its reverse (142631542), we get a palindrome (387767783).

The spelling of 245136241 in words is "two hundred forty-five million, one hundred thirty-six thousand, two hundred forty-one".