421000032 has 72 divisors (see below), whose sum is σ = 1120593096. Its totient is φ = 138385408.

The previous prime is 421000031. The next prime is 421000049. The reversal of 421000032 is 230000124.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 420999981 and 421000017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421000031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2136958 + ... + 2137154.

It is an arithmetic number, because the mean of its divisors is an integer number (15563793).

Almost surely, 2^421000032 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 421000032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560296548).

421000032 is an abundant number, since it is smaller than the sum of its proper divisors (699593064).

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

421000032 is a wasteful number, since it uses less digits than its factorization.

421000032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 421000032 is about 20518.2853084755. The cubic root of 421000032 is about 749.4811415751.

Adding to 421000032 its reverse (230000124), we get a palindrome (651000156).

The spelling of 421000032 in words is "four hundred twenty-one million, thirty-two", and thus it is an aban number.