42186487 has 4 divisors (see below), whose sum is σ = 48213136. Its totient is φ = 36159840.

The previous prime is 42186461. The next prime is 42186511. The reversal of 42186487 is 78468124.

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 42186487 - 2⁷ = 42186359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42186407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3013314 + ... + 3013327.

It is an arithmetic number, because the mean of its divisors is an integer number (12053284).

Almost surely, 2^42186487 is an apocalyptic number.

42186487 is a deficient number, since it is larger than the sum of its proper divisors (6026649).

42186487 is an equidigital number, since it uses as much as digits as its factorization.

42186487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6026648.

The product of its digits is 86016, while the sum is 40.

The square root of 42186487 is about 6495.1125471388. The cubic root of 42186487 is about 348.1163761701.

The spelling of 42186487 in words is "forty-two million, one hundred eighty-six thousand, four hundred eighty-seven".