243560641 has 4 divisors (see below), whose sum is σ = 243671472. Its totient is φ = 243449812.

The previous prime is 243560633. The next prime is 243560671. The reversal of 243560641 is 146065342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146065342 = 2 ⋅73032671.

It is a cyclic number.

It is not a de Polignac number, because 243560641 - 2³ = 243560633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243560671) 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 in 3 ways as a sum of consecutive naturals, for example, 52051 + ... + 56536.

It is an arithmetic number, because the mean of its divisors is an integer number (60917868).

Almost surely, 2^243560641 is an apocalyptic number.

It is an amenable number.

243560641 is a deficient number, since it is larger than the sum of its proper divisors (110831).

243560641 is a wasteful number, since it uses less digits than its factorization.

243560641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110830.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 243560641 is about 15606.4294763408. The cubic root of 243560641 is about 624.5046878892.

The spelling of 243560641 in words is "two hundred forty-three million, five hundred sixty thousand, six hundred forty-one".