421243676 has 48 divisors (see below), whose sum is σ = 892866240. Its totient is φ = 170042880.

The previous prime is 421243649. The next prime is 421243679. The reversal of 421243676 is 676342124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421243679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26966 + ... + 39618.

It is an arithmetic number, because the mean of its divisors is an integer number (18601380).

Almost surely, 2^421243676 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 421243676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446433120).

421243676 is an abundant number, since it is smaller than the sum of its proper divisors (471622564).

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

421243676 is a wasteful number, since it uses less digits than its factorization.

421243676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12734 (or 12732 counting only the distinct ones).

The product of its digits is 48384, while the sum is 35.

The square root of 421243676 is about 20524.2216904807. The cubic root of 421243676 is about 749.6256952998.

The spelling of 421243676 in words is "four hundred twenty-one million, two hundred forty-three thousand, six hundred seventy-six".