421534340 has 48 divisors (see below), whose sum is σ = 948713472. Its totient is φ = 156917376.

The previous prime is 421534277. The next prime is 421534357. The reversal of 421534340 is 43435124.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4637 + ... + 29403.

It is an arithmetic number, because the mean of its divisors is an integer number (19764864).

Almost surely, 2^421534340 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 421534340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474356736).

421534340 is an abundant number, since it is smaller than the sum of its proper divisors (527179132).

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

421534340 is a wasteful number, since it uses less digits than its factorization.

421534340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24836 (or 24834 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 421534340 is about 20531.3014687331. The cubic root of 421534340 is about 749.7980730463.

Adding to 421534340 its reverse (43435124), we get a palindrome (464969464).

The spelling of 421534340 in words is "four hundred twenty-one million, five hundred thirty-four thousand, three hundred forty".