42671685 has 16 divisors (see below), whose sum is σ = 78028416. Its totient is φ = 19507008.

The previous prime is 42671677. The next prime is 42671689. The reversal of 42671685 is 58617624.

It is not a de Polignac number, because 42671685 - 2³ = 42671677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42671689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203094 + ... + 203303.

It is an arithmetic number, because the mean of its divisors is an integer number (4876776).

Almost surely, 2^42671685 is an apocalyptic number.

It is an amenable number.

42671685 is a deficient number, since it is larger than the sum of its proper divisors (35356731).

42671685 is a wasteful number, since it uses less digits than its factorization.

42671685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406412.

The product of its digits is 80640, while the sum is 39.

The square root of 42671685 is about 6532.3567722530. The cubic root of 42671685 is about 349.4458851011.

The spelling of 42671685 in words is "forty-two million, six hundred seventy-one thousand, six hundred eighty-five".