42105745 has 16 divisors (see below), whose sum is σ = 55383552. Its totient is φ = 30476160.

The previous prime is 42105737. The next prime is 42105757. The reversal of 42105745 is 54750124.

It is not a de Polignac number, because 42105745 - 2³ = 42105737 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10549 + ... + 13981.

It is an arithmetic number, because the mean of its divisors is an integer number (3461472).

Almost surely, 2^42105745 is an apocalyptic number.

It is an amenable number.

42105745 is a deficient number, since it is larger than the sum of its proper divisors (13277807).

42105745 is a wasteful number, since it uses less digits than its factorization.

42105745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3672.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 42105745 is about 6488.8939735520. The cubic root of 42105745 is about 347.8941441590.

Adding to 42105745 its reverse (54750124), we get a palindrome (96855869).

The spelling of 42105745 in words is "forty-two million, one hundred five thousand, seven hundred forty-five".