42146187 has 4 divisors (see below), whose sum is σ = 56194920. Its totient is φ = 28097456.

The previous prime is 42146173. The next prime is 42146207. The reversal of 42146187 is 78164124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42146187 - 2⁴ = 42146171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42146107) 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 3 ways as a sum of consecutive naturals, for example, 7024362 + ... + 7024367.

It is an arithmetic number, because the mean of its divisors is an integer number (14048730).

Almost surely, 2^42146187 is an apocalyptic number.

42146187 is a deficient number, since it is larger than the sum of its proper divisors (14048733).

42146187 is a wasteful number, since it uses less digits than its factorization.

42146187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14048732.

The product of its digits is 10752, while the sum is 33.

The square root of 42146187 is about 6492.0094731909. The cubic root of 42146187 is about 348.0054910615.

It can be divided in two parts, 4214 and 6187, that added together give a palindrome (10401).

The spelling of 42146187 in words is "forty-two million, one hundred forty-six thousand, one hundred eighty-seven".