42123135 has 16 divisors (see below), whose sum is σ = 67641984. Its totient is φ = 22384032.

The previous prime is 42123121. The next prime is 42123149. The reversal of 42123135 is 53132124.

It is an interprime number because it is at equal distance from previous prime (42123121) and next prime (42123149).

It is not a de Polignac number, because 42123135 - 2⁴ = 42123119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717 + ... + 9206.

It is an arithmetic number, because the mean of its divisors is an integer number (4227624).

Almost surely, 2^42123135 is an apocalyptic number.

42123135 is a deficient number, since it is larger than the sum of its proper divisors (25518849).

42123135 is a wasteful number, since it uses less digits than its factorization.

42123135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10214.

The product of its digits is 720, while the sum is 21.

The square root of 42123135 is about 6490.2338170516. The cubic root of 42123135 is about 347.9420318956.

Adding to 42123135 its reverse (53132124), we get a palindrome (95255259).

The spelling of 42123135 in words is "forty-two million, one hundred twenty-three thousand, one hundred thirty-five".