42105243 has 8 divisors (see below), whose sum is σ = 59442768. Its totient is φ = 26418944.

The previous prime is 42105229. The next prime is 42105247. The reversal of 42105243 is 34250124.

42105243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42105243 - 2⁵ = 42105211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42105247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412746 + ... + 412847.

It is an arithmetic number, because the mean of its divisors is an integer number (7430346).

Almost surely, 2^42105243 is an apocalyptic number.

42105243 is a deficient number, since it is larger than the sum of its proper divisors (17337525).

42105243 is a wasteful number, since it uses less digits than its factorization.

42105243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825613.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 42105243 is about 6488.8552919602. The cubic root of 42105243 is about 347.8927615800.

Adding to 42105243 its reverse (34250124), we get a palindrome (76355367).

It can be divided in two parts, 4210 and 5243, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 42105243 in words is "forty-two million, one hundred five thousand, two hundred forty-three".