42089817 has 64 divisors (see below), whose sum is σ = 74280960. Its totient is φ = 20563200.

The previous prime is 42089813. The next prime is 42089837. The reversal of 42089817 is 71898024.

It is not a de Polignac number, because 42089817 - 2² = 42089813 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42089813) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 408588 + ... + 408690.

It is an arithmetic number, because the mean of its divisors is an integer number (1160640).

Almost surely, 2^42089817 is an apocalyptic number.

It is an amenable number.

42089817 is a deficient number, since it is larger than the sum of its proper divisors (32191143).

42089817 is a wasteful number, since it uses less digits than its factorization.

42089817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 42089817 is about 6487.6665296546. Note that the first 3 decimals coincide. The cubic root of 42089817 is about 347.8502708364.

The spelling of 42089817 in words is "forty-two million, eighty-nine thousand, eight hundred seventeen".