421204253140 has 192 divisors, whose sum is σ = 1002194436096. Its totient is φ = 147384000000.

The previous prime is 421204253137. The next prime is 421204253161. The reversal of 421204253140 is 41352402124.

It is a junction number, because it is equal to n+sod(n) for n = 421204253099 and 421204253108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 157694005 + ... + 157696675.

It is an arithmetic number, because the mean of its divisors is an integer number (5219762688).

Almost surely, 2^421204253140 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 421204253140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501097218048).

421204253140 is an abundant number, since it is smaller than the sum of its proper divisors (580990182956).

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

421204253140 is a wasteful number, since it uses less digits than its factorization.

421204253140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2990 (or 2988 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 421204253140 its reverse (41352402124), we get a palindrome (462556655264).

The spelling of 421204253140 in words is "four hundred twenty-one billion, two hundred four million, two hundred fifty-three thousand, one hundred forty".