42478315 has 8 divisors (see below), whose sum is σ = 55608048. Its totient is φ = 30893280.

The previous prime is 42478313. The next prime is 42478327. The reversal of 42478315 is 51387424.

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

It is not a de Polignac number, because 42478315 - 2¹ = 42478313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42478313) 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, 386112 + ... + 386221.

It is an arithmetic number, because the mean of its divisors is an integer number (6951006).

Almost surely, 2^42478315 is an apocalyptic number.

42478315 is a deficient number, since it is larger than the sum of its proper divisors (13129733).

42478315 is a wasteful number, since it uses less digits than its factorization.

42478315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772349.

The product of its digits is 26880, while the sum is 34.

The square root of 42478315 is about 6517.5390294190. The cubic root of 42478315 is about 348.9172388547.

The spelling of 42478315 in words is "forty-two million, four hundred seventy-eight thousand, three hundred fifteen".