42107145 has 32 divisors (see below), whose sum is σ = 70447104. Its totient is φ = 21451200.

The previous prime is 42107129. The next prime is 42107239. The reversal of 42107145 is 54170124.

It is not a de Polignac number, because 42107145 - 2⁴ = 42107129 is a prime.

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 in 31 ways as a sum of consecutive naturals, for example, 38050 + ... + 39140.

It is an arithmetic number, because the mean of its divisors is an integer number (2201472).

Almost surely, 2^42107145 is an apocalyptic number.

It is an amenable number.

42107145 is a deficient number, since it is larger than the sum of its proper divisors (28339959).

42107145 is a wasteful number, since it uses less digits than its factorization.

42107145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 42107145 is about 6489.0018492831. The cubic root of 42107145 is about 347.8979998989.

Subtracting from 42107145 its sum of digits (24), we obtain a square (42107121 = 6489²).

Adding to 42107145 its reverse (54170124), we get a palindrome (96277269).

The spelling of 42107145 in words is "forty-two million, one hundred seven thousand, one hundred forty-five".