42431425 has 6 divisors (see below), whose sum is σ = 52614998. Its totient is φ = 33945120.

The previous prime is 42431407. The next prime is 42431447. The reversal of 42431425 is 52413424.

It is a happy number.

42431425 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 25281 + 42406144 = 159^2 + 6512^2 .

It is not a de Polignac number, because 42431425 - 2¹¹ = 42429377 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1697257 = 42431425 / (4 + 2 + 4 + 3 + 1 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42431425.

It is an unprimeable number.

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, 848604 + ... + 848653.

Almost surely, 2^42431425 is an apocalyptic number.

It is an amenable number.

42431425 is a deficient number, since it is larger than the sum of its proper divisors (10183573).

42431425 is a wasteful number, since it uses less digits than its factorization.

42431425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697267 (or 1697262 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 42431425 is about 6513.9408195040. The cubic root of 42431425 is about 348.7888066339.

Adding to 42431425 its reverse (52413424), we get a palindrome (94844849).

The spelling of 42431425 in words is "forty-two million, four hundred thirty-one thousand, four hundred twenty-five".