42909065 has 8 divisors (see below), whose sum is σ = 52462728. Its totient is φ = 33679360.

The previous prime is 42909043. The next prime is 42909089. The reversal of 42909065 is 56090924.

It can be written as a sum of positive squares in 4 ways, for example, as 150544 + 42758521 = 388^2 + 6539^2 .

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

It is not a de Polignac number, because 42909065 - 2⁸ = 42908809 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80696 + ... + 81225.

It is an arithmetic number, because the mean of its divisors is an integer number (6557841).

Almost surely, 2^42909065 is an apocalyptic number.

It is an amenable number.

42909065 is a deficient number, since it is larger than the sum of its proper divisors (9553663).

42909065 is a wasteful number, since it uses less digits than its factorization.

42909065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161979.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 42909065 is about 6550.5011258682. The cubic root of 42909065 is about 350.0926693394.

Adding to 42909065 its reverse (56090924), we get a palindrome (98999989).

The spelling of 42909065 in words is "forty-two million, nine hundred nine thousand, sixty-five".