42895021 has 4 divisors (see below), whose sum is σ = 46194652. Its totient is φ = 39595392.

The previous prime is 42895007. The next prime is 42895051. The reversal of 42895021 is 12059824.

42895021 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 can be written as a sum of positive squares in 2 ways, for example, as 13616100 + 29278921 = 3690^2 + 5411^2 .

It is a cyclic number.

It is not a de Polignac number, because 42895021 - 2¹³ = 42886829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42895051) by changing a digit.

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, 1649796 + ... + 1649821.

It is an arithmetic number, because the mean of its divisors is an integer number (11548663).

Almost surely, 2^42895021 is an apocalyptic number.

It is an amenable number.

42895021 is a deficient number, since it is larger than the sum of its proper divisors (3299631).

42895021 is a wasteful number, since it uses less digits than its factorization.

42895021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3299630.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 42895021 is about 6549.4290590860. The cubic root of 42895021 is about 350.0544704339.

The spelling of 42895021 in words is "forty-two million, eight hundred ninety-five thousand, twenty-one".