42520785 has 8 divisors (see below), whose sum is σ = 68033280. Its totient is φ = 22677744.

The previous prime is 42520783. The next prime is 42520831. The reversal of 42520785 is 58702524.

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

It is not a de Polignac number, because 42520785 - 2¹ = 42520783 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42520783) 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, 1417345 + ... + 1417374.

It is an arithmetic number, because the mean of its divisors is an integer number (8504160).

Almost surely, 2^42520785 is an apocalyptic number.

It is an amenable number.

42520785 is a deficient number, since it is larger than the sum of its proper divisors (25512495).

42520785 is a wasteful number, since it uses less digits than its factorization.

42520785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834727.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 42520785 is about 6520.7963470730. The cubic root of 42520785 is about 349.0334831026.

The spelling of 42520785 in words is "forty-two million, five hundred twenty thousand, seven hundred eighty-five".