42661871 has 8 divisors (see below), whose sum is σ = 50437920. Its totient is φ = 35306208.

The previous prime is 42661807. The next prime is 42661877. The reversal of 42661871 is 17816624.

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

It is not a de Polignac number, because 42661871 - 2⁶ = 42661807 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 (42661877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104876 + ... + 105281.

It is an arithmetic number, because the mean of its divisors is an integer number (6304740).

Almost surely, 2^42661871 is an apocalyptic number.

42661871 is a deficient number, since it is larger than the sum of its proper divisors (7776049).

42661871 is a wasteful number, since it uses less digits than its factorization.

42661871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210193.

The product of its digits is 16128, while the sum is 35.

The square root of 42661871 is about 6531.6055453464. The cubic root of 42661871 is about 349.4190935268.

The spelling of 42661871 in words is "forty-two million, six hundred sixty-one thousand, eight hundred seventy-one".