421243340 has 96 divisors (see below), whose sum is σ = 1075576320. Its totient is φ = 135281664.

The previous prime is 421243337. The next prime is 421243363. The reversal of 421243340 is 43342124.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 901787 + ... + 902253.

It is an arithmetic number, because the mean of its divisors is an integer number (11203920).

Almost surely, 2^421243340 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 421243340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537788160).

421243340 is an abundant number, since it is smaller than the sum of its proper divisors (654332980).

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

421243340 is a wasteful number, since it uses less digits than its factorization.

421243340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 877 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 421243340 is about 20524.2135050286. The cubic root of 421243340 is about 749.6254959898.

Adding to 421243340 its reverse (43342124), we get a palindrome (464585464).

The spelling of 421243340 in words is "four hundred twenty-one million, two hundred forty-three thousand, three hundred forty".