1240240225 has 36 divisors (see below), whose sum is σ = 1796834028. Its totient is φ = 846720000.

The previous prime is 1240240171. The next prime is 1240240231. The reversal of 1240240225 is 5220420421.

It can be written as a sum of positive squares in 6 ways, for example, as 96177249 + 1144062976 = 9807^2 + 33824^2 .

It is not a de Polignac number, because 1240240225 - 2¹⁹ = 1239715937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1240240196 and 1240240205.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 293125 + ... + 297325.

Almost surely, 2^1240240225 is an apocalyptic number.

It is an amenable number.

1240240225 is a deficient number, since it is larger than the sum of its proper divisors (556593803).

1240240225 is a wasteful number, since it uses less digits than its factorization.

1240240225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4466 (or 4454 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1240240225 is about 35217.0445239234. The cubic root of 1240240225 is about 1074.4064435585.

Adding to 1240240225 its reverse (5220420421), we get a palindrome (6460660646).

The spelling of 1240240225 in words is "one billion, two hundred forty million, two hundred forty thousand, two hundred twenty-five".