242643406 has 16 divisors (see below), whose sum is σ = 379491840. Its totient is φ = 116212320.

The previous prime is 242643391. The next prime is 242643407. The reversal of 242643406 is 604346242.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242643407) 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, 9105 + ... + 23836.

It is an arithmetic number, because the mean of its divisors is an integer number (23718240).

Almost surely, 2^242643406 is an apocalyptic number.

242643406 is a deficient number, since it is larger than the sum of its proper divisors (136848434).

242643406 is a wasteful number, since it uses less digits than its factorization.

242643406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33099.

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 242643406 is about 15577.0153110280. The cubic root of 242643406 is about 623.7197524566.

Adding to 242643406 its reverse (604346242), we get a palindrome (846989648).

It can be divided in two parts, 242643 and 406, that added together give a square (243049 = 493²).

The spelling of 242643406 in words is "two hundred forty-two million, six hundred forty-three thousand, four hundred six".