242640250 has 16 divisors (see below), whose sum is σ = 454223016. Its totient is φ = 97056000.

The previous prime is 242640227. The next prime is 242640253. The reversal of 242640250 is 52046242.

It can be written as a sum of positive squares in 4 ways, for example, as 13329801 + 229310449 = 3651^2 + 15143^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (242640253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485031 + ... + 485530.

Almost surely, 2^242640250 is an apocalyptic number.

242640250 is a deficient number, since it is larger than the sum of its proper divisors (211582766).

242640250 is an equidigital number, since it uses as much as digits as its factorization.

242640250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970578 (or 970568 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 242640250 is about 15576.9140075947. The cubic root of 242640250 is about 623.7170482577.

Adding to 242640250 its reverse (52046242), we get a palindrome (294686492).

The spelling of 242640250 in words is "two hundred forty-two million, six hundred forty thousand, two hundred fifty".