42089971 has 36 divisors (see below), whose sum is σ = 55796160. Its totient is φ = 31600800.

The previous prime is 42089963. The next prime is 42090017. The reversal of 42089971 is 17998024.

It is not a de Polignac number, because 42089971 - 2³ = 42089963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42089071) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 183685 + ... + 183913.

Almost surely, 2^42089971 is an apocalyptic number.

42089971 is a deficient number, since it is larger than the sum of its proper divisors (13706189).

42089971 is a wasteful number, since it uses less digits than its factorization.

42089971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 42089971 is about 6487.6783983178. The cubic root of 42089971 is about 347.8506950789.

The spelling of 42089971 in words is "forty-two million, eighty-nine thousand, nine hundred seventy-one".