42143145 has 16 divisors (see below), whose sum is σ = 73559232. Its totient is φ = 20432960.

The previous prime is 42143141. The next prime is 42143183. The reversal of 42143145 is 54134124.

It is not a de Polignac number, because 42143145 - 2² = 42143141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42143141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127542 + ... + 127871.

It is an arithmetic number, because the mean of its divisors is an integer number (4597452).

Almost surely, 2^42143145 is an apocalyptic number.

It is an amenable number.

42143145 is a deficient number, since it is larger than the sum of its proper divisors (31416087).

42143145 is a wasteful number, since it uses less digits than its factorization.

42143145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255432.

The product of its digits is 1920, while the sum is 24.

The square root of 42143145 is about 6491.7751809501. The cubic root of 42143145 is about 347.9971181556.

Adding to 42143145 its reverse (54134124), we get a palindrome (96277269).

The spelling of 42143145 in words is "forty-two million, one hundred forty-three thousand, one hundred forty-five".