240956581 has 2 divisors, whose sum is σ = 240956582. Its totient is φ = 240956580.

The previous prime is 240956561. The next prime is 240956587. The reversal of 240956581 is 185659042.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190688481 + 50268100 = 13809^2 + 7090^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240956581 is a prime.

It is a super-2 number, since 2×240956581² = 116120147854419122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240956587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120478290 + 120478291.

It is an arithmetic number, because the mean of its divisors is an integer number (120478291).

Almost surely, 2^240956581 is an apocalyptic number.

It is an amenable number.

240956581 is a deficient number, since it is larger than the sum of its proper divisors (1).

240956581 is an equidigital number, since it uses as much as digits as its factorization.

240956581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 240956581 is about 15522.7762014403. The cubic root of 240956581 is about 622.2710510020.

The spelling of 240956581 in words is "two hundred forty million, nine hundred fifty-six thousand, five hundred eighty-one".