42404040425 has 24 divisors (see below), whose sum is σ = 53821388544. Its totient is φ = 33123504960.

The previous prime is 42404040397. The next prime is 42404040431. The reversal of 42404040425 is 52404040424.

It is not a de Polignac number, because 42404040425 - 2⁶ = 42404040361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5395799 + ... + 5403651.

It is an arithmetic number, because the mean of its divisors is an integer number (2242557856).

Almost surely, 2^42404040425 is an apocalyptic number.

It is an amenable number.

42404040425 is a deficient number, since it is larger than the sum of its proper divisors (11417348119).

42404040425 is a wasteful number, since it uses less digits than its factorization.

42404040425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12929 (or 12924 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 29.

Adding to 42404040425 its reverse (52404040424), we get a palindrome (94808080849).

Subtracting 42404040425 from its reverse (52404040424), we obtain a palindrome (9999999999).

The spelling of 42404040425 in words is "forty-two billion, four hundred four million, forty thousand, four hundred twenty-five".