43420425 has 24 divisors (see below), whose sum is σ = 73733376. Its totient is φ = 22530240.

The previous prime is 43420423. The next prime is 43420427. The reversal of 43420425 is 52402434.

It is an interprime number because it is at equal distance from previous prime (43420423) and next prime (43420427).

It is not a de Polignac number, because 43420425 - 2¹ = 43420423 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43420395 and 43420404.

It is not an unprimeable number, because it can be changed into a prime (43420423) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5049 + ... + 10598.

It is an arithmetic number, because the mean of its divisors is an integer number (3072224).

Almost surely, 2^43420425 is an apocalyptic number.

It is an amenable number.

43420425 is a deficient number, since it is larger than the sum of its proper divisors (30312951).

43420425 is a wasteful number, since it uses less digits than its factorization.

43420425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15697 (or 15692 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 43420425 is about 6589.4176525699. The cubic root of 43420425 is about 351.4779003350.

Adding to 43420425 its reverse (52402434), we get a palindrome (95822859).

Subtracting 43420425 from its reverse (52402434), we obtain a square (8982009 = 2997²).

The spelling of 43420425 in words is "forty-three million, four hundred twenty thousand, four hundred twenty-five".