42686 has 8 divisors (see below), whose sum is σ = 73200. Its totient is φ = 18288.

The previous prime is 42683. The next prime is 42689. The reversal of 42686 is 68624.

It is an interprime number because it is at equal distance from previous prime (42683) and next prime (42689).

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

It is a super-3 number, since 3×42686³ = 233333789774568, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42683) 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, 1511 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (9150).

2⁴²⁶⁸⁶ is an apocalyptic number.

42686 is a deficient number, since it is larger than the sum of its proper divisors (30514).

42686 is a wasteful number, since it uses less digits than its factorization.

42686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058.

The product of its digits is 2304, while the sum is 26.

The square root of 42686 is about 206.6059050463. The cubic root of 42686 is about 34.9484956744.

It can be divided in two parts, 426 and 86, that added together give a 9-th power (512 = 2⁹).

The spelling of 42686 in words is "forty-two thousand, six hundred eighty-six".