42445765 has 8 divisors (see below), whose sum is σ = 50992920. Its totient is φ = 33917952.

The previous prime is 42445759. The next prime is 42445801. The reversal of 42445765 is 56754424.

It can be written as a sum of positive squares in 4 ways, for example, as 22572001 + 19873764 = 4751^2 + 4458^2 .

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 42445765 - 2³ = 42445757 is a prime.

It is a congruent 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, 541 + ... + 9229.

It is an arithmetic number, because the mean of its divisors is an integer number (6374115).

Almost surely, 2^42445765 is an apocalyptic number.

It is an amenable number.

42445765 is a deficient number, since it is larger than the sum of its proper divisors (8547155).

42445765 is an equidigital number, since it uses as much as digits as its factorization.

42445765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671.

The product of its digits is 134400, while the sum is 37.

The square root of 42445765 is about 6515.0414426924. The cubic root of 42445765 is about 348.8280940893.

The spelling of 42445765 in words is "forty-two million, four hundred forty-five thousand, seven hundred sixty-five".