42512885 has 4 divisors (see below), whose sum is σ = 51015468. Its totient is φ = 34010304.

The previous prime is 42512879. The next prime is 42512891. The reversal of 42512885 is 58821524.

It is a happy number.

42512885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42512879) and next prime (42512891).

It can be written as a sum of positive squares in 2 ways, for example, as 16370116 + 26142769 = 4046^2 + 5113^2 .

It is a cyclic number.

It is not a de Polignac number, because 42512885 - 2⁸ = 42512629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4251284 + ... + 4251293.

It is an arithmetic number, because the mean of its divisors is an integer number (12753867).

Almost surely, 2^42512885 is an apocalyptic number.

It is an amenable number.

42512885 is a deficient number, since it is larger than the sum of its proper divisors (8502583).

42512885 is an equidigital number, since it uses as much as digits as its factorization.

42512885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8502582.

The product of its digits is 25600, while the sum is 35.

The square root of 42512885 is about 6520.1905646998. The cubic root of 42512885 is about 349.0118659469.

The spelling of 42512885 in words is "forty-two million, five hundred twelve thousand, eight hundred eighty-five".