421203312 has 30 divisors (see below), whose sum is σ = 1178784672. Its totient is φ = 140401056.

The previous prime is 421203287. The next prime is 421203313. The reversal of 421203312 is 213302124.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421203313) 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 5 ways as a sum of consecutive naturals, for example, 1462368 + ... + 1462655.

Almost surely, 2^421203312 is an apocalyptic number.

It is an amenable number.

421203312 is an abundant number, since it is smaller than the sum of its proper divisors (757581360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421203312 is a wasteful number, since it uses less digits than its factorization.

421203312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2925037 (or 2925028 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 421203312 is about 20523.2383409636. The cubic root of 421203312 is about 749.6017512347.

Adding to 421203312 its reverse (213302124), we get a palindrome (634505436).

The spelling of 421203312 in words is "four hundred twenty-one million, two hundred three thousand, three hundred twelve".