421509602 has 8 divisors (see below), whose sum is σ = 647685612. Its totient is φ = 205614400.

The previous prime is 421509601. The next prime is 421509617. The reversal of 421509602 is 206905124.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 421111441 + 398161 = 20521^2 + 631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (421509601) 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 3 ways as a sum of consecutive naturals, for example, 2570099 + ... + 2570262.

Almost surely, 2^421509602 is an apocalyptic number.

421509602 is a deficient number, since it is larger than the sum of its proper divisors (226176010).

421509602 is a wasteful number, since it uses less digits than its factorization.

421509602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5140404.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 421509602 is about 20530.6990139157. The cubic root of 421509602 is about 749.7834053069.

The spelling of 421509602 in words is "four hundred twenty-one million, five hundred nine thousand, six hundred two".