42782515 has 8 divisors (see below), whose sum is σ = 52105680. Its totient is φ = 33714912.

The previous prime is 42782513. The next prime is 42782521. The reversal of 42782515 is 51528724.

It is a happy number.

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 42782515 - 2¹ = 42782513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42782513) 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, 63520 + ... + 64189.

It is an arithmetic number, because the mean of its divisors is an integer number (6513210).

Almost surely, 2^42782515 is an apocalyptic number.

42782515 is a deficient number, since it is larger than the sum of its proper divisors (9323165).

42782515 is a wasteful number, since it uses less digits than its factorization.

42782515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127781.

The product of its digits is 22400, while the sum is 34.

The square root of 42782515 is about 6540.8344268908. The cubic root of 42782515 is about 349.7481589684.

The spelling of 42782515 in words is "forty-two million, seven hundred eighty-two thousand, five hundred fifteen".