42908825 has 12 divisors (see below), whose sum is σ = 53292348. Its totient is φ = 34272000.

The previous prime is 42908809. The next prime is 42908839. The reversal of 42908825 is 52880924.

It can be written as a sum of positive squares in 6 ways, for example, as 6270016 + 36638809 = 2504^2 + 6053^2 .

It is not a de Polignac number, because 42908825 - 2⁴ = 42908809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22925 + ... + 24725.

It is an arithmetic number, because the mean of its divisors is an integer number (4441029).

Almost surely, 2^42908825 is an apocalyptic number.

It is an amenable number.

42908825 is a deficient number, since it is larger than the sum of its proper divisors (10383523).

42908825 is a wasteful number, since it uses less digits than its factorization.

42908825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764 (or 2759 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 42908825 is about 6550.4828066334. The cubic root of 42908825 is about 350.0920166226.

The spelling of 42908825 in words is "forty-two million, nine hundred eight thousand, eight hundred twenty-five".