421240312 has 16 divisors (see below), whose sum is σ = 817061400. Its totient is φ = 203357280.

The previous prime is 421240289. The next prime is 421240327. The reversal of 421240312 is 213042124.

It is a self number, because there is not a number n which added to its sum of digits gives 421240312.

It is a congruent number.

It is an unprimeable number.

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, 907614 + ... + 908077.

Almost surely, 2^421240312 is an apocalyptic number.

It is an amenable number.

421240312 is a deficient number, since it is larger than the sum of its proper divisors (395821088).

421240312 is a wasteful number, since it uses less digits than its factorization.

421240312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815726 (or 1815722 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421240312 is about 20524.1397383666. The cubic root of 421240312 is about 749.6236998217.

Adding to 421240312 its reverse (213042124), we get a palindrome (634282436).

The spelling of 421240312 in words is "four hundred twenty-one million, two hundred forty thousand, three hundred twelve".