42404025 has 12 divisors (see below), whose sum is σ = 70108112. Its totient is φ = 22615440.

The previous prime is 42404017. The next prime is 42404027. The reversal of 42404025 is 52040424.

It is not a de Polignac number, because 42404025 - 2³ = 42404017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42403992 and 42404010.

It is not an unprimeable number, because it can be changed into a prime (42404027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282619 + ... + 282768.

Almost surely, 2^42404025 is an apocalyptic number.

It is an amenable number.

42404025 is a deficient number, since it is larger than the sum of its proper divisors (27704087).

42404025 is a wasteful number, since it uses less digits than its factorization.

42404025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565400 (or 565395 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42404025 is about 6511.8372983360. The cubic root of 42404025 is about 348.7137139313.

Adding to 42404025 its reverse (52040424), we get a palindrome (94444449).

The spelling of 42404025 in words is "forty-two million, four hundred four thousand, twenty-five".