42520085 has 8 divisors (see below), whose sum is σ = 51059160. Its totient is φ = 33992704.

The previous prime is 42520063. The next prime is 42520097. The reversal of 42520085 is 58002524.

It can be written as a sum of positive squares in 4 ways, for example, as 23107249 + 19412836 = 4807^2 + 4406^2 .

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 42520085 - 2⁶ = 42520021 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12221 + ... + 15309.

It is an arithmetic number, because the mean of its divisors is an integer number (6382395).

Almost surely, 2^42520085 is an apocalyptic number.

It is an amenable number.

42520085 is a deficient number, since it is larger than the sum of its proper divisors (8539075).

42520085 is a wasteful number, since it uses less digits than its factorization.

42520085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 42520085 is about 6520.7426724262. The cubic root of 42520085 is about 349.0315677666.

The spelling of 42520085 in words is "forty-two million, five hundred twenty thousand, eighty-five".