42661187 has 8 divisors (see below), whose sum is σ = 43068672. Its totient is φ = 42256000.

The previous prime is 42661163. The next prime is 42661207. The reversal of 42661187 is 78116624.

42661187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42661187 - 2¹⁴ = 42644803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42661147) 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 7 ways as a sum of consecutive naturals, for example, 76313 + ... + 76869.

It is an arithmetic number, because the mean of its divisors is an integer number (5383584).

Almost surely, 2^42661187 is an apocalyptic number.

42661187 is a deficient number, since it is larger than the sum of its proper divisors (407485).

42661187 is a wasteful number, since it uses less digits than its factorization.

42661187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1149.

The product of its digits is 16128, while the sum is 35.

The square root of 42661187 is about 6531.5531843506. The cubic root of 42661187 is about 349.4172260986.

The spelling of 42661187 in words is "forty-two million, six hundred sixty-one thousand, one hundred eighty-seven".