42086815 has 8 divisors (see below), whose sum is σ = 53475120. Its totient is φ = 31688832.

The previous prime is 42086783. The next prime is 42086819. The reversal of 42086815 is 51868024.

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 42086815 - 2⁵ = 42086783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42086819) 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, 247485 + ... + 247654.

It is an arithmetic number, because the mean of its divisors is an integer number (6684390).

Almost surely, 2^42086815 is an apocalyptic number.

42086815 is a deficient number, since it is larger than the sum of its proper divisors (11388305).

42086815 is a wasteful number, since it uses less digits than its factorization.

42086815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495161.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 42086815 is about 6487.4351634525. The cubic root of 42086815 is about 347.8420006544.

The spelling of 42086815 in words is "forty-two million, eighty-six thousand, eight hundred fifteen".