240060581 has 2 divisors, whose sum is σ = 240060582. Its totient is φ = 240060580.

The previous prime is 240060563. The next prime is 240060593. The reversal of 240060581 is 185060042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121903681 + 118156900 = 11041^2 + 10870^2 .

It is a cyclic number.

It is not a de Polignac number, because 240060581 - 2⁶ = 240060517 is a prime.

It is a super-4 number, since 4×240060581⁴ (a number of 35 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 240060581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240066581) 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, 120030290 + 120030291.

It is an arithmetic number, because the mean of its divisors is an integer number (120030291).

Almost surely, 2^240060581 is an apocalyptic number.

It is an amenable number.

240060581 is a deficient number, since it is larger than the sum of its proper divisors (1).

240060581 is an equidigital number, since it uses as much as digits as its factorization.

240060581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 240060581 is about 15493.8885048267. Note that the first 3 decimals coincide. The cubic root of 240060581 is about 621.4987854730.

The spelling of 240060581 in words is "two hundred forty million, sixty thousand, five hundred eighty-one".