42544425 has 96 divisors (see below), whose sum is σ = 89994240. Its totient is φ = 17222400.

The previous prime is 42544393. The next prime is 42544451. The reversal of 42544425 is 52444524.

It is not a de Polignac number, because 42544425 - 2⁵ = 42544393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42544392 and 42544401.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 306006 + ... + 306144.

It is an arithmetic number, because the mean of its divisors is an integer number (937440).

Almost surely, 2^42544425 is an apocalyptic number.

It is an amenable number.

42544425 is an abundant number, since it is smaller than the sum of its proper divisors (47449815).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42544425 is a wasteful number, since it uses less digits than its factorization.

42544425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 218 counting only the distinct ones).

The product of its digits is 25600, while the sum is 30.

The square root of 42544425 is about 6522.6087572382. The cubic root of 42544425 is about 349.0981543993.

Adding to 42544425 its reverse (52444524), we get a palindrome (94988949).

Subtracting 42544425 from its reverse (52444524), we obtain a palindrome (9900099).

It can be divided in two parts, 425 and 44425, that added together give a triangular number (44850 = T₂₉₉).

The spelling of 42544425 in words is "forty-two million, five hundred forty-four thousand, four hundred twenty-five".