42422425 has 12 divisors (see below), whose sum is σ = 52720956. Its totient is φ = 33862400.

The previous prime is 42422423. The next prime is 42422431. The reversal of 42422425 is 52422424.

It can be written as a sum of positive squares in 6 ways, for example, as 120409 + 42302016 = 347^2 + 6504^2 .

It is not a de Polignac number, because 42422425 - 2¹ = 42422423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 42422425.

It is not an unprimeable number, because it can be changed into a prime (42422423) 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 11 ways as a sum of consecutive naturals, for example, 11397 + ... + 14653.

It is an arithmetic number, because the mean of its divisors is an integer number (4393413).

Almost surely, 2^42422425 is an apocalyptic number.

42422425 is the 3257-th decagonal number.

It is an amenable number.

42422425 is a deficient number, since it is larger than the sum of its proper divisors (10298531).

42422425 is a wasteful number, since it uses less digits than its factorization.

42422425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788 (or 3783 counting only the distinct ones).

The product of its digits is 5120, while the sum is 25.

The square root of 42422425 is about 6513.2499568188. The cubic root of 42422425 is about 348.7641447139.

Adding to 42422425 its reverse (52422424), we get a palindrome (94844849).

Subtracting 42422425 from its reverse (52422424), we obtain a palindrome (9999999).

The spelling of 42422425 in words is "forty-two million, four hundred twenty-two thousand, four hundred twenty-five".