240165641 has 2 divisors, whose sum is σ = 240165642. Its totient is φ = 240165640.

The previous prime is 240165637. The next prime is 240165661. The reversal of 240165641 is 146561042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206525641 + 33640000 = 14371^2 + 5800^2 .

It is a cyclic number.

It is not a de Polignac number, because 240165641 - 2² = 240165637 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (240165661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120082820 + 120082821.

It is an arithmetic number, because the mean of its divisors is an integer number (120082821).

Almost surely, 2^240165641 is an apocalyptic number.

It is an amenable number.

240165641 is a deficient number, since it is larger than the sum of its proper divisors (1).

240165641 is an equidigital number, since it uses as much as digits as its factorization.

240165641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 240165641 is about 15497.2785030147. The cubic root of 240165641 is about 621.5894363958.

The spelling of 240165641 in words is "two hundred forty million, one hundred sixty-five thousand, six hundred forty-one".