42671691 has 20 divisors (see below), whose sum is σ = 64831800. Its totient is φ = 27962496.

The previous prime is 42671689. The next prime is 42671729. The reversal of 42671691 is 19617624.

42671691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42671691 - 2¹ = 42671689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42671621) 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 19 ways as a sum of consecutive naturals, for example, 315 + ... + 9243.

It is an arithmetic number, because the mean of its divisors is an integer number (3241590).

Almost surely, 2^42671691 is an apocalyptic number.

42671691 is a deficient number, since it is larger than the sum of its proper divisors (22160109).

42671691 is an equidigital number, since it uses as much as digits as its factorization.

42671691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9000 (or 8991 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 42671691 is about 6532.3572315053. The cubic root of 42671691 is about 349.4459014794.

The spelling of 42671691 in words is "forty-two million, six hundred seventy-one thousand, six hundred ninety-one".