421656312 has 128 divisors (see below), whose sum is σ = 1319846400. Its totient is φ = 109056000.

The previous prime is 421656311. The next prime is 421656337. The reversal of 421656312 is 213656124.

It is a self number, because there is not a number n which added to its sum of digits gives 421656312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421656311) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 740764 + ... + 741332.

It is an arithmetic number, because the mean of its divisors is an integer number (10311300).

Almost surely, 2^421656312 is an apocalyptic number.

421656312 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421656312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659923200).

421656312 is an abundant number, since it is smaller than the sum of its proper divisors (898190088).

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

421656312 is a wasteful number, since it uses less digits than its factorization.

421656312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997 (or 993 counting only the distinct ones).

The product of its digits is 8640, while the sum is 30.

The square root of 421656312 is about 20534.2716452276. The cubic root of 421656312 is about 749.8703847122.

The spelling of 421656312 in words is "four hundred twenty-one million, six hundred fifty-six thousand, three hundred twelve".