42089605 has 4 divisors (see below), whose sum is σ = 50507532. Its totient is φ = 33671680.

The previous prime is 42089591. The next prime is 42089639. The reversal of 42089605 is 50698024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32615521 + 9474084 = 5711^2 + 3078^2 .

It is not a de Polignac number, because 42089605 - 2¹⁵ = 42056837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4208956 + ... + 4208965.

It is an arithmetic number, because the mean of its divisors is an integer number (12626883).

Almost surely, 2^42089605 is an apocalyptic number.

It is an amenable number.

42089605 is a deficient number, since it is larger than the sum of its proper divisors (8417927).

42089605 is an equidigital number, since it uses as much as digits as its factorization.

42089605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417926.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 42089605 is about 6487.6501909397. The cubic root of 42089605 is about 347.8496868124.

The spelling of 42089605 in words is "forty-two million, eighty-nine thousand, six hundred five".