42506385 has 8 divisors (see below), whose sum is σ = 68010240. Its totient is φ = 22670064.

The previous prime is 42506383. The next prime is 42506411. The reversal of 42506385 is 58360524.

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

It is not a de Polignac number, because 42506385 - 2¹ = 42506383 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42506383) 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, 1416865 + ... + 1416894.

It is an arithmetic number, because the mean of its divisors is an integer number (8501280).

Almost surely, 2^42506385 is an apocalyptic number.

It is an amenable number.

42506385 is a deficient number, since it is larger than the sum of its proper divisors (25503855).

42506385 is a wasteful number, since it uses less digits than its factorization.

42506385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833767.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 42506385 is about 6519.6920939566. The cubic root of 42506385 is about 348.9940776712.

The spelling of 42506385 in words is "forty-two million, five hundred six thousand, three hundred eighty-five".