42664205 has 8 divisors (see below), whose sum is σ = 52163352. Its totient is φ = 33487168.

The previous prime is 42664201. The next prime is 42664229. The reversal of 42664205 is 50246624.

It can be written as a sum of positive squares in 4 ways, for example, as 21696964 + 20967241 = 4658^2 + 4579^2 .

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 42664205 - 2² = 42664201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42664201) 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, 80234 + ... + 80763.

It is an arithmetic number, because the mean of its divisors is an integer number (6520419).

Almost surely, 2^42664205 is an apocalyptic number.

It is an amenable number.

42664205 is a deficient number, since it is larger than the sum of its proper divisors (9499147).

42664205 is a wasteful number, since it uses less digits than its factorization.

42664205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161055.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 42664205 is about 6531.7842126023. The cubic root of 42664205 is about 349.4254655656.

The spelling of 42664205 in words is "forty-two million, six hundred sixty-four thousand, two hundred five".