42687565 has 8 divisors (see below), whose sum is σ = 52991640. Its totient is φ = 32972352.

The previous prime is 42687559. The next prime is 42687569. The reversal of 42687565 is 56578624.

42687565 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 619369 + 42068196 = 787^2 + 6486^2 .

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 42687565 - 2¹⁵ = 42654797 is a prime.

It is a super-3 number, since 3×42687565³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42687569) 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, 147054 + ... + 147343.

It is an arithmetic number, because the mean of its divisors is an integer number (6623955).

Almost surely, 2^42687565 is an apocalyptic number.

It is an amenable number.

42687565 is a deficient number, since it is larger than the sum of its proper divisors (10304075).

42687565 is a wasteful number, since it uses less digits than its factorization.

42687565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294431.

The product of its digits is 403200, while the sum is 43.

The square root of 42687565 is about 6533.5721469959. The cubic root of 42687565 is about 349.4892277566.

The spelling of 42687565 in words is "forty-two million, six hundred eighty-seven thousand, five hundred sixty-five".