42500242 has 4 divisors (see below), whose sum is σ = 63750366. Its totient is φ = 21250120.

The previous prime is 42500239. The next prime is 42500273. The reversal of 42500242 is 24200524.

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., 34821801 + 7678441 = 5901^2 + 2771^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10625059 + ... + 10625062.

Almost surely, 2^42500242 is an apocalyptic number.

42500242 is a deficient number, since it is larger than the sum of its proper divisors (21250124).

42500242 is a wasteful number, since it uses less digits than its factorization.

42500242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21250123.

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 42500242 is about 6519.2209657290. The cubic root of 42500242 is about 348.9772647155.

Adding to 42500242 its reverse (24200524), we get a palindrome (66700766).

The spelling of 42500242 in words is "forty-two million, five hundred thousand, two hundred forty-two".