42040025 has 12 divisors (see below), whose sum is σ = 53343312. Its totient is φ = 32849040.

The previous prime is 42040007. The next prime is 42040051. The reversal of 42040025 is 52004024.

42040025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42040025 - 2⁸ = 42039769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42039985 and 42040012.

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 11 ways as a sum of consecutive naturals, for example, 18479 + ... + 20628.

It is an arithmetic number, because the mean of its divisors is an integer number (4445276).

Almost surely, 2^42040025 is an apocalyptic number.

It is an amenable number.

42040025 is a deficient number, since it is larger than the sum of its proper divisors (11303287).

42040025 is a wasteful number, since it uses less digits than its factorization.

42040025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39160 (or 39155 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 42040025 is about 6483.8279588527. The cubic root of 42040025 is about 347.7130484526.

Adding to 42040025 its reverse (52004024), we get a palindrome (94044049).

The spelling of 42040025 in words is "forty-two million, forty thousand, twenty-five".