42186641 has 4 divisors (see below), whose sum is σ = 48213312. Its totient is φ = 36159972.

The previous prime is 42186611. The next prime is 42186643. The reversal of 42186641 is 14668124.

42186641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42186641 - 2¹⁴ = 42170257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42186598 and 42186607.

It is not an unprimeable number, because it can be changed into a prime (42186643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3013325 + ... + 3013338.

It is an arithmetic number, because the mean of its divisors is an integer number (12053328).

Almost surely, 2^42186641 is an apocalyptic number.

It is an amenable number.

42186641 is a deficient number, since it is larger than the sum of its proper divisors (6026671).

42186641 is an equidigital number, since it uses as much as digits as its factorization.

42186641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6026670.

The product of its digits is 9216, while the sum is 32.

The square root of 42186641 is about 6495.1244021959. The cubic root of 42186641 is about 348.1167997643.

The spelling of 42186641 in words is "forty-two million, one hundred eighty-six thousand, six hundred forty-one".