1421321000 has 128 divisors (see below), whose sum is σ = 3655791360. Its totient is φ = 512928000.

The previous prime is 1421320993. The next prime is 1421321003. The reversal of 1421321000 is 1231241.

It is not an unprimeable number, because it can be changed into a prime (1421321003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1726589 + ... + 1727411.

It is an arithmetic number, because the mean of its divisors is an integer number (28560870).

Almost surely, 2^1421321000 is an apocalyptic number.

1421321000 is a gapful number since it is divisible by the number (10) 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 1421321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1827895680).

1421321000 is an abundant number, since it is smaller than the sum of its proper divisors (2234470360).

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

1421321000 is a wasteful number, since it uses less digits than its factorization.

1421321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012 (or 998 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1421321000 is about 37700.4111383417. The cubic root of 1421321000 is about 1124.3392992962.

Adding to 1421321000 its reverse (1231241), we get a palindrome (1422552241).

The spelling of 1421321000 in words is "one billion, four hundred twenty-one million, three hundred twenty-one thousand".