42665765 has 8 divisors (see below), whose sum is σ = 52850688. Its totient is φ = 33031440.

The previous prime is 42665747. The next prime is 42665803. The reversal of 42665765 is 56756624.

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

It is not a de Polignac number, because 42665765 - 2¹⁴ = 42649381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137477 + ... + 137786.

It is an arithmetic number, because the mean of its divisors is an integer number (6606336).

Almost surely, 2^42665765 is an apocalyptic number.

It is an amenable number.

42665765 is a deficient number, since it is larger than the sum of its proper divisors (10184923).

42665765 is a wasteful number, since it uses less digits than its factorization.

42665765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275299.

The product of its digits is 302400, while the sum is 41.

The square root of 42665765 is about 6531.9036275806. The cubic root of 42665765 is about 349.4297243822.

The spelling of 42665765 in words is "forty-two million, six hundred sixty-five thousand, seven hundred sixty-five".