421217312 has 12 divisors (see below), whose sum is σ = 829271646. Its totient is φ = 210608640.

The previous prime is 421217297. The next prime is 421217317. The reversal of 421217312 is 213712124.

It can be written as a sum of positive squares in only one way, i.e., 309619216 + 111598096 = 17596^2 + 10564^2 .

It is not an unprimeable number, because it can be changed into a prime (421217317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6581489 + ... + 6581552.

Almost surely, 2^421217312 is an apocalyptic number.

It is an amenable number.

421217312 is a deficient number, since it is larger than the sum of its proper divisors (408054334).

421217312 is a wasteful number, since it uses less digits than its factorization.

421217312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13163051 (or 13163043 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 421217312 is about 20523.5794149071. The cubic root of 421217312 is about 749.6100562566.

Adding to 421217312 its reverse (213712124), we get a palindrome (634929436).

The spelling of 421217312 in words is "four hundred twenty-one million, two hundred seventeen thousand, three hundred twelve".