421144064 has 160 divisors (see below), whose sum is σ = 985222656. Its totient is φ = 178053120.

The previous prime is 421144001. The next prime is 421144109. The reversal of 421144064 is 460441124.

It is a congruent number.

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, 8960489 + ... + 8960535.

Almost surely, 2^421144064 is an apocalyptic number.

421144064 is a gapful number since it is divisible by the number (44) 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 421144064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (492611328).

421144064 is an abundant number, since it is smaller than the sum of its proper divisors (564078592).

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

421144064 is a wasteful number, since it uses less digits than its factorization.

421144064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 421144064 is about 20521.7948532773. The cubic root of 421144064 is about 749.5666023443.

Adding to 421144064 its reverse (460441124), we get a palindrome (881585188).

The spelling of 421144064 in words is "four hundred twenty-one million, one hundred forty-four thousand, sixty-four".