422145673 has 4 divisors (see below), whose sum is σ = 422597140. Its totient is φ = 421694208.

The previous prime is 422145637. The next prime is 422145677. The reversal of 422145673 is 376541224.

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 149499529 + 272646144 = 12227^2 + 16512^2 .

It is a cyclic number.

It is not a de Polignac number, because 422145673 - 2¹³ = 422137481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422145677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224328 + ... + 226201.

It is an arithmetic number, because the mean of its divisors is an integer number (105649285).

Almost surely, 2^422145673 is an apocalyptic number.

It is an amenable number.

422145673 is a deficient number, since it is larger than the sum of its proper divisors (451467).

422145673 is an equidigital number, since it uses as much as digits as its factorization.

422145673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451466.

The product of its digits is 40320, while the sum is 34.

The square root of 422145673 is about 20546.1839035866. The cubic root of 422145673 is about 750.1603645233.

Adding to 422145673 its reverse (376541224), we get a palindrome (798686897).

It can be divided in two parts, 4221 and 45673, that added together give a palindrome (49894).

The spelling of 422145673 in words is "four hundred twenty-two million, one hundred forty-five thousand, six hundred seventy-three".