42782865 has 8 divisors (see below), whose sum is σ = 68452608. Its totient is φ = 22817520.

The previous prime is 42782849. The next prime is 42782867. The reversal of 42782865 is 56828724.

It is a happy number.

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

It is not a de Polignac number, because 42782865 - 2⁴ = 42782849 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42782867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426081 + ... + 1426110.

It is an arithmetic number, because the mean of its divisors is an integer number (8556576).

Almost surely, 2^42782865 is an apocalyptic number.

It is an amenable number.

42782865 is a deficient number, since it is larger than the sum of its proper divisors (25669743).

42782865 is a wasteful number, since it uses less digits than its factorization.

42782865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2852199.

The product of its digits is 215040, while the sum is 42.

The square root of 42782865 is about 6540.8611818323. The cubic root of 42782865 is about 349.7491127188.

The spelling of 42782865 in words is "forty-two million, seven hundred eighty-two thousand, eight hundred sixty-five".