42870565 has 8 divisors (see below), whose sum is σ = 51487128. Its totient is φ = 34268160.

The previous prime is 42870547. The next prime is 42870571. The reversal of 42870565 is 56507824.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 20449 + 42850116 = 143^2 + 6546^2 .

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

It is not a de Polignac number, because 42870565 - 2¹⁹ = 42346277 is a prime.

It is a Duffinian number.

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, 5005 + ... + 10525.

It is an arithmetic number, because the mean of its divisors is an integer number (6435891).

Almost surely, 2^42870565 is an apocalyptic number.

It is an amenable number.

42870565 is a deficient number, since it is larger than the sum of its proper divisors (8616563).

42870565 is a wasteful number, since it uses less digits than its factorization.

42870565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7079.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 42870565 is about 6547.5617599225. The cubic root of 42870565 is about 349.9879315567.

The spelling of 42870565 in words is "forty-two million, eight hundred seventy thousand, five hundred sixty-five".