210006242 has 4 divisors (see below), whose sum is σ = 315009366. Its totient is φ = 105003120.

The previous prime is 210006241. The next prime is 210006271. The reversal of 210006242 is 242600012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 209989081 + 17161 = 14491^2 + 131^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 210006242.

It is not an unprimeable number, because it can be changed into a prime (210006241) 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 as a sum of consecutive naturals, namely, 52501559 + ... + 52501562.

Almost surely, 2^210006242 is an apocalyptic number.

210006242 is a deficient number, since it is larger than the sum of its proper divisors (105003124).

210006242 is a wasteful number, since it uses less digits than its factorization.

210006242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105003123.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 210006242 is about 14491.5921140501. The cubic root of 210006242 is about 594.3980844181.

Adding to 210006242 its reverse (242600012), we get a palindrome (452606254).

The spelling of 210006242 in words is "two hundred ten million, six thousand, two hundred forty-two".