42666625 has 8 divisors (see below), whose sum is σ = 53248104. Its totient is φ = 34133200.

The previous prime is 42666623. The next prime is 42666629. The reversal of 42666625 is 52666624.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 559504 + 42107121 = 748^2 + 6489^2 .

It is not a de Polignac number, because 42666625 - 2¹ = 42666623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42666623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170542 + ... + 170791.

It is an arithmetic number, because the mean of its divisors is an integer number (6656013).

Almost surely, 2^42666625 is an apocalyptic number.

It is an amenable number.

42666625 is a deficient number, since it is larger than the sum of its proper divisors (10581479).

42666625 is an equidigital number, since it uses as much as digits as its factorization.

42666625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341348 (or 341338 counting only the distinct ones).

The product of its digits is 103680, while the sum is 37.

The square root of 42666625 is about 6531.9694579813. The cubic root of 42666625 is about 349.4320721470.

Subtracting 42666625 from its reverse (52666624), we obtain a palindrome (9999999).

The spelling of 42666625 in words is "forty-two million, six hundred sixty-six thousand, six hundred twenty-five".