421143246 has 64 divisors (see below), whose sum is σ = 1016985600.
Its totient is φ = 128692800.
The previous prime is 421143241. The next prime is 421143253. The reversal of 421143246 is 642341124.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (421143241) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25186 + ... + 38426.
It is an arithmetic number, because the mean of its divisors is an integer number (15890400).
Almost surely, 2421143246 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 421143246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (508492800).
421143246 is an abundant number, since it is smaller than the sum of its proper divisors (595842354).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
421143246 is a wasteful number, since it uses less digits than its factorization.
421143246 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13302 (or 13296 counting only the distinct ones).
The product of its digits is 4608, while the sum is 27.
The square root of 421143246 is about 20521.7749232370.
The cubic root of 421143246 is about 749.5661170425.
The spelling of 421143246 in words is "four hundred twenty-one million, one hundred forty-three thousand, two hundred forty-six".