242321545 has 4 divisors (see below), whose sum is σ = 290785860. Its totient is φ = 193857232.

The previous prime is 242321507. The next prime is 242321567. The reversal of 242321545 is 545123242.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545123242 = 2 ⋅272561621.

It can be written as a sum of positive squares in 2 ways, for example, as 115691536 + 126630009 = 10756^2 + 11253^2 .

It is a cyclic number.

It is not a de Polignac number, because 242321545 - 2⁹ = 242321033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24232150 + ... + 24232159.

It is an arithmetic number, because the mean of its divisors is an integer number (72696465).

Almost surely, 2^242321545 is an apocalyptic number.

It is an amenable number.

242321545 is a deficient number, since it is larger than the sum of its proper divisors (48464315).

242321545 is an equidigital number, since it uses as much as digits as its factorization.

242321545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48464314.

The product of its digits is 9600, while the sum is 28.

The square root of 242321545 is about 15566.6806031344. The cubic root of 242321545 is about 623.4438470364.

Adding to 242321545 its reverse (545123242), we get a palindrome (787444787).

The spelling of 242321545 in words is "two hundred forty-two million, three hundred twenty-one thousand, five hundred forty-five".