424220245 has 4 divisors (see below), whose sum is σ = 509064300. Its totient is φ = 339376192.

The previous prime is 424220189. The next prime is 424220249. The reversal of 424220245 is 542022424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 103917636 + 320302609 = 10194^2 + 17897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424220245 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424220249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42422020 + ... + 42422029.

It is an arithmetic number, because the mean of its divisors is an integer number (127266075).

Almost surely, 2^424220245 is an apocalyptic number.

It is an amenable number.

424220245 is a deficient number, since it is larger than the sum of its proper divisors (84844055).

424220245 is an equidigital number, since it uses as much as digits as its factorization.

424220245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84844054.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 424220245 is about 20596.6076090214. The cubic root of 424220245 is about 751.3872074403.

Adding to 424220245 its reverse (542022424), we get a palindrome (966242669).

The spelling of 424220245 in words is "four hundred twenty-four million, two hundred twenty thousand, two hundred forty-five".