42210705 has 16 divisors (see below), whose sum is σ = 67636800. Its totient is φ = 22479168.

The previous prime is 42210703. The next prime is 42210709. The reversal of 42210705 is 50701224.

It is not a de Polignac number, because 42210705 - 2¹ = 42210703 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42210703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11146 + ... + 14444.

It is an arithmetic number, because the mean of its divisors is an integer number (4227300).

Almost surely, 2^42210705 is an apocalyptic number.

It is an amenable number.

42210705 is a deficient number, since it is larger than the sum of its proper divisors (25426095).

42210705 is a wasteful number, since it uses less digits than its factorization.

42210705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4160.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 42210705 is about 6496.9766045446. The cubic root of 42210705 is about 348.1829778258.

Adding to 42210705 its reverse (50701224), we get a palindrome (92911929).

The spelling of 42210705 in words is "forty-two million, two hundred ten thousand, seven hundred five".