242643245 has 8 divisors (see below), whose sum is σ = 313569816. Its totient is φ = 179182656.

The previous prime is 242643239. The next prime is 242643301. The reversal of 242643245 is 542346242.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1865956 + 240777289 = 1366^2 + 15517^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 242643245 - 2⁴ = 242643229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1866422 + ... + 1866551.

It is an arithmetic number, because the mean of its divisors is an integer number (39196227).

Almost surely, 2^242643245 is an apocalyptic number.

It is an amenable number.

242643245 is a deficient number, since it is larger than the sum of its proper divisors (70926571).

242643245 is a wasteful number, since it uses less digits than its factorization.

242643245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732991.

The product of its digits is 46080, while the sum is 32.

The square root of 242643245 is about 15577.0101431565. The cubic root of 242643245 is about 623.7196145053.

Adding to 242643245 its reverse (542346242), we get a palindrome (784989487).

The spelling of 242643245 in words is "two hundred forty-two million, six hundred forty-three thousand, two hundred forty-five".