42666225 has 48 divisors (see below), whose sum is σ = 81244800. Its totient is φ = 19353600.

The previous prime is 42666223. The next prime is 42666257. The reversal of 42666225 is 52266624.

It is not a de Polignac number, because 42666225 - 2¹ = 42666223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42666223) 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 47 ways as a sum of consecutive naturals, for example, 94801 + ... + 95249.

It is an arithmetic number, because the mean of its divisors is an integer number (1692600).

Almost surely, 2^42666225 is an apocalyptic number.

It is an amenable number.

42666225 is a deficient number, since it is larger than the sum of its proper divisors (38578575).

42666225 is a wasteful number, since it uses less digits than its factorization.

42666225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 645 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 42666225 is about 6531.9388392728. The cubic root of 42666225 is about 349.4309801673.

The spelling of 42666225 in words is "forty-two million, six hundred sixty-six thousand, two hundred twenty-five".