242643361 has 4 divisors (see below), whose sum is σ = 242911792. Its totient is φ = 242374932.

The previous prime is 242643347. The next prime is 242643391. The reversal of 242643361 is 163346242.

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: 163346242 = 2 ⋅81673121.

It is a cyclic number.

It is not a de Polignac number, because 242643361 - 2⁹ = 242642849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242643301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132855 + ... + 134668.

It is an arithmetic number, because the mean of its divisors is an integer number (60727948).

Almost surely, 2^242643361 is an apocalyptic number.

It is an amenable number.

242643361 is a deficient number, since it is larger than the sum of its proper divisors (268431).

242643361 is an equidigital number, since it uses as much as digits as its factorization.

242643361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268430.

The product of its digits is 20736, while the sum is 31.

The square root of 242643361 is about 15577.0138665920. The cubic root of 242643361 is about 623.7197138988.

The spelling of 242643361 in words is "two hundred forty-two million, six hundred forty-three thousand, three hundred sixty-one".