242240545 has 8 divisors (see below), whose sum is σ = 290785320. Its totient is φ = 193728000.

The previous prime is 242240539. The next prime is 242240549. The reversal of 242240545 is 545042242.

It can be written as a sum of positive squares in 4 ways, for example, as 35916049 + 206324496 = 5993^2 + 14364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-242240545 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242240549) 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 7 ways as a sum of consecutive naturals, for example, 13951 + ... + 26059.

It is an arithmetic number, because the mean of its divisors is an integer number (36348165).

Almost surely, 2^242240545 is an apocalyptic number.

It is an amenable number.

242240545 is a deficient number, since it is larger than the sum of its proper divisors (48544775).

242240545 is a wasteful number, since it uses less digits than its factorization.

242240545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16115.

The product of its (nonzero) digits is 12800, while the sum is 28.

The square root of 242240545 is about 15564.0786749489. The cubic root of 242240545 is about 623.3743738091.

Adding to 242240545 its reverse (545042242), we get a palindrome (787282787).

The spelling of 242240545 in words is "two hundred forty-two million, two hundred forty thousand, five hundred forty-five".