242640626 has 8 divisors (see below), whose sum is σ = 385370460. Its totient is φ = 114183808.

The previous prime is 242640613. The next prime is 242640637. The reversal of 242640626 is 626046242.

It can be written as a sum of positive squares in 2 ways, for example, as 219069601 + 23571025 = 14801^2 + 4855^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242640592 and 242640601.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3568211 + ... + 3568278.

Almost surely, 2^242640626 is an apocalyptic number.

242640626 is a deficient number, since it is larger than the sum of its proper divisors (142729834).

242640626 is a wasteful number, since it uses less digits than its factorization.

242640626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136508.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 242640626 is about 15576.9260767329. The cubic root of 242640626 is about 623.7173704322.

Adding to 242640626 its reverse (626046242), we get a palindrome (868686868).

The spelling of 242640626 in words is "two hundred forty-two million, six hundred forty thousand, six hundred twenty-six".