42243825 has 48 divisors (see below), whose sum is σ = 77314496. Its totient is φ = 20217600.

The previous prime is 42243811. The next prime is 42243829. The reversal of 42243825 is 52834224.

It is not a de Polignac number, because 42243825 - 2⁷ = 42243697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42243792 and 42243801.

It is not an unprimeable number, because it can be changed into a prime (42243829) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35490 + ... + 36660.

Almost surely, 2^42243825 is an apocalyptic number.

It is an amenable number.

42243825 is a deficient number, since it is larger than the sum of its proper divisors (35070671).

42243825 is a wasteful number, since it uses less digits than its factorization.

42243825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1234 (or 1229 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 42243825 is about 6499.5249826430. The cubic root of 42243825 is about 348.2740195449.

The spelling of 42243825 in words is "forty-two million, two hundred forty-three thousand, eight hundred twenty-five".