42220245 has 8 divisors (see below), whose sum is σ = 67552416. Its totient is φ = 22517456.

The previous prime is 42220237. The next prime is 42220247. The reversal of 42220245 is 54202224.

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 42220245 - 2³ = 42220237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42220247) 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, 1407327 + ... + 1407356.

It is an arithmetic number, because the mean of its divisors is an integer number (8444052).

Almost surely, 2^42220245 is an apocalyptic number.

It is an amenable number.

42220245 is a deficient number, since it is larger than the sum of its proper divisors (25332171).

42220245 is a wasteful number, since it uses less digits than its factorization.

42220245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2814691.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42220245 is about 6497.7107507183. The cubic root of 42220245 is about 348.2092066809.

Adding to 42220245 its reverse (54202224), we get a palindrome (96422469).

The spelling of 42220245 in words is "forty-two million, two hundred twenty thousand, two hundred forty-five".