42712565 has 12 divisors (see below), whose sum is σ = 59623596. Its totient is φ = 29288448.

The previous prime is 42712559. The next prime is 42712573. The reversal of 42712565 is 56521724.

It can be written as a sum of positive squares in 2 ways, for example, as 26399044 + 16313521 = 5138^2 + 4039^2 .

It is not a de Polignac number, because 42712565 - 2⁸ = 42712309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86924 + ... + 87413.

It is an arithmetic number, because the mean of its divisors is an integer number (4968633).

Almost surely, 2^42712565 is an apocalyptic number.

It is an amenable number.

42712565 is a deficient number, since it is larger than the sum of its proper divisors (16911031).

42712565 is a wasteful number, since it uses less digits than its factorization.

42712565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174356 (or 174349 counting only the distinct ones).

The product of its digits is 16800, while the sum is 32.

The square root of 42712565 is about 6535.4850623347. The cubic root of 42712565 is about 349.5574406393.

The spelling of 42712565 in words is "forty-two million, seven hundred twelve thousand, five hundred sixty-five".