42140187 has 6 divisors (see below), whose sum is σ = 60869172. Its totient is φ = 28093452.

The previous prime is 42140183. The next prime is 42140201. The reversal of 42140187 is 78104124.

It is not a de Polignac number, because 42140187 - 2² = 42140183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42140187.

It is not an unprimeable number, because it can be changed into a prime (42140183) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2341113 + ... + 2341130.

It is an arithmetic number, because the mean of its divisors is an integer number (10144862).

Almost surely, 2^42140187 is an apocalyptic number.

42140187 is a deficient number, since it is larger than the sum of its proper divisors (18728985).

42140187 is a wasteful number, since it uses less digits than its factorization.

42140187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682249 (or 4682246 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 42140187 is about 6491.5473502086. The cubic root of 42140187 is about 347.9889760678.

The spelling of 42140187 in words is "forty-two million, one hundred forty thousand, one hundred eighty-seven".