42205273 has 4 divisors (see below), whose sum is σ = 46042128. Its totient is φ = 38368420.

The previous prime is 42205217. The next prime is 42205279. The reversal of 42205273 is 37250224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42205273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42205279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1918411 + ... + 1918432.

It is an arithmetic number, because the mean of its divisors is an integer number (11510532).

Almost surely, 2^42205273 is an apocalyptic number.

It is an amenable number.

42205273 is a deficient number, since it is larger than the sum of its proper divisors (3836855).

42205273 is a wasteful number, since it uses less digits than its factorization.

42205273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836854.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 42205273 is about 6496.5585504943. The cubic root of 42205273 is about 348.1680415588.

Adding to 42205273 its reverse (37250224), we get a palindrome (79455497).

The spelling of 42205273 in words is "forty-two million, two hundred five thousand, two hundred seventy-three".