42105145 has 8 divisors (see below), whose sum is σ = 51280704. Its totient is φ = 33181104.

The previous prime is 42105143. The next prime is 42105179. The reversal of 42105145 is 54150124.

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 42105145 - 2¹ = 42105143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42105143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62509 + ... + 63178.

It is an arithmetic number, because the mean of its divisors is an integer number (6410088).

Almost surely, 2^42105145 is an apocalyptic number.

It is an amenable number.

42105145 is a deficient number, since it is larger than the sum of its proper divisors (9175559).

42105145 is a wasteful number, since it uses less digits than its factorization.

42105145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125759.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 42105145 is about 6488.8477405469. The cubic root of 42105145 is about 347.8924916729.

Adding to 42105145 its reverse (54150124), we get a palindrome (96255269).

The spelling of 42105145 in words is "forty-two million, one hundred five thousand, one hundred forty-five".