1421443660 has 96 divisors (see below), whose sum is σ = 3684078720. Its totient is φ = 448616448.

The previous prime is 1421443633. The next prime is 1421443679. The reversal of 1421443660 is 663441241.

It is an unprimeable number.

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, 830886 + ... + 832594.

It is an arithmetic number, because the mean of its divisors is an integer number (38375820).

Almost surely, 2^1421443660 is an apocalyptic number.

1421443660 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 1421443660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1842039360).

1421443660 is an abundant number, since it is smaller than the sum of its proper divisors (2262635060).

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

1421443660 is a wasteful number, since it uses less digits than its factorization.

1421443660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2195 (or 2193 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 1421443660 is about 37702.0378759557. The cubic root of 1421443660 is about 1124.3716418590.

The spelling of 1421443660 in words is "one billion, four hundred twenty-one million, four hundred forty-three thousand, six hundred sixty".