421051712 has 56 divisors (see below), whose sum is σ = 862599240. Its totient is φ = 203765760.

The previous prime is 421051681. The next prime is 421051717. The reversal of 421051712 is 217150124.

It can be written as a sum of positive squares in 4 ways, for example, as 101929216 + 319122496 = 10096^2 + 17864^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421051717) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636662 + ... + 637322.

Almost surely, 2^421051712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421051712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431299620).

421051712 is an abundant number, since it is smaller than the sum of its proper divisors (441547528).

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

421051712 is a wasteful number, since it uses less digits than its factorization.

421051712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 421051712 is about 20519.5446343236. The cubic root of 421051712 is about 749.5118079232.

The spelling of 421051712 in words is "four hundred twenty-one million, fifty-one thousand, seven hundred twelve".