42665285 has 8 divisors (see below), whose sum is σ = 55136760. Its totient is φ = 31506624.

The previous prime is 42665281. The next prime is 42665309. The reversal of 42665285 is 58256624.

It can be written as a sum of positive squares in 4 ways, for example, as 9740641 + 32924644 = 3121^2 + 5738^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42665285 - 2² = 42665281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42665281) 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, 328130 + ... + 328259.

It is an arithmetic number, because the mean of its divisors is an integer number (6892095).

Almost surely, 2^42665285 is an apocalyptic number.

It is an amenable number.

42665285 is a deficient number, since it is larger than the sum of its proper divisors (12471475).

42665285 is a wasteful number, since it uses less digits than its factorization.

42665285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656407.

The product of its digits is 115200, while the sum is 38.

The square root of 42665285 is about 6531.8668847428. The cubic root of 42665285 is about 349.4284139882.

The spelling of 42665285 in words is "forty-two million, six hundred sixty-five thousand, two hundred eighty-five".