42012205 has 8 divisors (see below), whose sum is σ = 51777432. Its totient is φ = 32701248.

The previous prime is 42012203. The next prime is 42012209. The reversal of 42012205 is 50221024.

It can be written as a sum of positive squares in 4 ways, for example, as 22458121 + 19554084 = 4739^2 + 4422^2 .

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 42012205 - 2¹ = 42012203 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 (42012203) 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, 113362 + ... + 113731.

It is an arithmetic number, because the mean of its divisors is an integer number (6472179).

Almost surely, 2^42012205 is an apocalyptic number.

It is an amenable number.

42012205 is a deficient number, since it is larger than the sum of its proper divisors (9765227).

42012205 is a wasteful number, since it uses less digits than its factorization.

42012205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227135.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 42012205 is about 6481.6822662022. The cubic root of 42012205 is about 347.6363317874.

Adding to 42012205 its reverse (50221024), we get a palindrome (92233229).

The spelling of 42012205 in words is "forty-two million, twelve thousand, two hundred five".