240261685 has 4 divisors (see below), whose sum is σ = 288314028. Its totient is φ = 192209344.

The previous prime is 240261661. The next prime is 240261689. The reversal of 240261685 is 586162042.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586162042 = 2 ⋅293081021.

It can be written as a sum of positive squares in 2 ways, for example, as 179935396 + 60326289 = 13414^2 + 7767^2 .

It is a cyclic number.

It is not a de Polignac number, because 240261685 - 2⁹ = 240261173 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 240261685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240261689) 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 3 ways as a sum of consecutive naturals, for example, 24026164 + ... + 24026173.

It is an arithmetic number, because the mean of its divisors is an integer number (72078507).

Almost surely, 2^240261685 is an apocalyptic number.

It is an amenable number.

240261685 is a deficient number, since it is larger than the sum of its proper divisors (48052343).

240261685 is an equidigital number, since it uses as much as digits as its factorization.

240261685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48052342.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 240261685 is about 15500.3769309007. The cubic root of 240261685 is about 621.6722847433.

The spelling of 240261685 in words is "two hundred forty million, two hundred sixty-one thousand, six hundred eighty-five".