42665597 has 8 divisors (see below), whose sum is σ = 48650616. Its totient is φ = 37066752.

The previous prime is 42665593. The next prime is 42665603. The reversal of 42665597 is 79556624.

42665597 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3865156 + 38800441 = 1966^2 + 6229^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42665597 - 2² = 42665593 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 (42665593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96308 + ... + 96749.

It is an arithmetic number, because the mean of its divisors is an integer number (6081327).

Almost surely, 2^42665597 is an apocalyptic number.

It is an amenable number.

42665597 is a deficient number, since it is larger than the sum of its proper divisors (5985019).

42665597 is a wasteful number, since it uses less digits than its factorization.

42665597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193087.

The product of its digits is 453600, while the sum is 44.

The square root of 42665597 is about 6531.8907676109. The cubic root of 42665597 is about 349.4292657454.

Adding to 42665597 its reverse (79556624), we get a palindrome (122222221).

The spelling of 42665597 in words is "forty-two million, six hundred sixty-five thousand, five hundred ninety-seven".