42187 has 2 divisors, whose sum is σ = 42188. Its totient is φ = 42186.

The previous prime is 42181. The next prime is 42193. The reversal of 42187 is 78124.

42187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (42181) and next prime (42193).

It is a cyclic number.

It is not a de Polignac number, because 42187 - 2³ = 42179 is a prime.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (42181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21093 + 21094.

It is an arithmetic number, because the mean of its divisors is an integer number (21094).

2⁴²¹⁸⁷ is an apocalyptic number.

42187 is a deficient number, since it is larger than the sum of its proper divisors (1).

42187 is an equidigital number, since it uses as much as digits as its factorization.

42187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 448, while the sum is 22.

The square root of 42187 is about 205.3947418996. The cubic root of 42187 is about 34.8117787230.

Subtracting 42187 from its reverse (78124), we obtain a cube (35937 = 33³).

It can be divided in two parts, 4218 and 7, that added together give a square (4225 = 65²).

The spelling of 42187 in words is "forty-two thousand, one hundred eighty-seven".