42543425 has 12 divisors (see below), whose sum is σ = 53649840. Its totient is φ = 33456720.

The previous prime is 42543421. The next prime is 42543427. The reversal of 42543425 is 52434524.

It is not a de Polignac number, because 42543425 - 2² = 42543421 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42543421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12947 + ... + 15896.

It is an arithmetic number, because the mean of its divisors is an integer number (4470820).

Almost surely, 2^42543425 is an apocalyptic number.

It is an amenable number.

42543425 is a deficient number, since it is larger than the sum of its proper divisors (11106415).

42543425 is a wasteful number, since it uses less digits than its factorization.

42543425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28912 (or 28907 counting only the distinct ones).

The product of its digits is 19200, while the sum is 29.

The square root of 42543425 is about 6522.5321003426. The cubic root of 42543425 is about 349.0954192122.

Adding to 42543425 its reverse (52434524), we get a palindrome (94977949).

The spelling of 42543425 in words is "forty-two million, five hundred forty-three thousand, four hundred twenty-five".