242915345 has 4 divisors (see below), whose sum is σ = 291498420. Its totient is φ = 194332272.

The previous prime is 242915341. The next prime is 242915357. The reversal of 242915345 is 543519242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83978896 + 158936449 = 9164^2 + 12607^2 .

It is a cyclic number.

It is not a de Polignac number, because 242915345 - 2² = 242915341 is a prime.

It is a super-3 number, since 3×242915345³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (242915341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24291530 + ... + 24291539.

It is an arithmetic number, because the mean of its divisors is an integer number (72874605).

Almost surely, 2^242915345 is an apocalyptic number.

It is an amenable number.

242915345 is a deficient number, since it is larger than the sum of its proper divisors (48583075).

242915345 is an equidigital number, since it uses as much as digits as its factorization.

242915345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48583074.

The product of its digits is 43200, while the sum is 35.

The square root of 242915345 is about 15585.7417212015. The cubic root of 242915345 is about 623.9526736858.

The spelling of 242915345 in words is "two hundred forty-two million, nine hundred fifteen thousand, three hundred forty-five".