421522005 has 8 divisors (see below), whose sum is σ = 674435232. Its totient is φ = 224811728.

The previous prime is 421521983. The next prime is 421522007. The reversal of 421522005 is 500225124.

It is a happy number.

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 421522005 - 2⁶ = 421521941 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 (421522007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14050719 + ... + 14050748.

It is an arithmetic number, because the mean of its divisors is an integer number (84304404).

Almost surely, 2^421522005 is an apocalyptic number.

It is an amenable number.

421522005 is a deficient number, since it is larger than the sum of its proper divisors (252913227).

421522005 is a wasteful number, since it uses less digits than its factorization.

421522005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28101475.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 421522005 is about 20531.0010715503. The cubic root of 421522005 is about 749.7907594077.

Adding to 421522005 its reverse (500225124), we get a palindrome (921747129).

The spelling of 421522005 in words is "four hundred twenty-one million, five hundred twenty-two thousand, five".