240420245 has 12 divisors (see below), whose sum is σ = 312405156. Its totient is φ = 177540480.

The previous prime is 240420241. The next prime is 240420247. The reversal of 240420245 is 542024042.

It can be written as a sum of positive squares in 6 ways, for example, as 114105124 + 126315121 = 10682^2 + 11239^2 .

It is not a de Polignac number, because 240420245 - 2² = 240420241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 240420245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240420241) 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, 141416 + ... + 143105.

It is an arithmetic number, because the mean of its divisors is an integer number (26033763).

Almost surely, 2^240420245 is an apocalyptic number.

It is an amenable number.

240420245 is a deficient number, since it is larger than the sum of its proper divisors (71984911).

240420245 is a wasteful number, since it uses less digits than its factorization.

240420245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284552 (or 284539 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 240420245 is about 15505.4908016483. The cubic root of 240420245 is about 621.8090116087.

Adding to 240420245 its reverse (542024042), we get a palindrome (782444287).

The spelling of 240420245 in words is "two hundred forty million, four hundred twenty thousand, two hundred forty-five".