42895665 has 12 divisors (see below), whose sum is σ = 74352564. Its totient is φ = 22877664.

The previous prime is 42895637. The next prime is 42895687. The reversal of 42895665 is 56659824.

42895665 is a `hidden beast` number, since 4 + 2 + 89 + 566 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10131489 + 32764176 = 3183^2 + 5724^2 .

It is not a de Polignac number, because 42895665 - 2⁸ = 42895409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 953237 = 42895665 / (4 + 2 + 8 + 9 + 5 + 6 + 6 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42895665.

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 11 ways as a sum of consecutive naturals, for example, 476574 + ... + 476663.

It is an arithmetic number, because the mean of its divisors is an integer number (6196047).

Almost surely, 2^42895665 is an apocalyptic number.

42895665 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42895665 is a deficient number, since it is larger than the sum of its proper divisors (31456899).

42895665 is a wasteful number, since it uses less digits than its factorization.

42895665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953248 (or 953245 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 42895665 is about 6549.4782234923. The cubic root of 42895665 is about 350.0562222608.

The spelling of 42895665 in words is "forty-two million, eight hundred ninety-five thousand, six hundred sixty-five".