42045425 has 6 divisors (see below), whose sum is σ = 52136358. Its totient is φ = 33636320.

The previous prime is 42045323. The next prime is 42045427. The reversal of 42045425 is 52454024.

42045425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 3157729 + 38887696 = 1777^2 + 6236^2 .

It is not a de Polignac number, because 42045425 - 2¹⁸ = 41783281 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42045394 and 42045403.

It is not an unprimeable number, because it can be changed into a prime (42045427) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 840884 + ... + 840933.

It is an arithmetic number, because the mean of its divisors is an integer number (8689393).

Almost surely, 2^42045425 is an apocalyptic number.

It is an amenable number.

42045425 is a deficient number, since it is larger than the sum of its proper divisors (10090933).

42045425 is a wasteful number, since it uses less digits than its factorization.

42045425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681827 (or 1681822 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 42045425 is about 6484.2443661540. The cubic root of 42045425 is about 347.7279356153.

Adding to 42045425 its reverse (52454024), we get a palindrome (94499449).

The spelling of 42045425 in words is "forty-two million, forty-five thousand, four hundred twenty-five".