42666825 has 12 divisors (see below), whose sum is σ = 70542608. Its totient is φ = 22755600.

The previous prime is 42666797. The next prime is 42666829. The reversal of 42666825 is 52866624.

It is not a de Polignac number, because 42666825 - 2⁷ = 42666697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42666829) 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, 284371 + ... + 284520.

Almost surely, 2^42666825 is an apocalyptic number.

It is an amenable number.

42666825 is a deficient number, since it is larger than the sum of its proper divisors (27875783).

42666825 is a wasteful number, since it uses less digits than its factorization.

42666825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568904 (or 568899 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 42666825 is about 6531.9847672817. The cubic root of 42666825 is about 349.4326181343.

The spelling of 42666825 in words is "forty-two million, six hundred sixty-six thousand, eight hundred twenty-five".