1421320545440 has 24 divisors (see below), whose sum is σ = 3357869788980. Its totient is φ = 568528218112.

The previous prime is 1421320545431. The next prime is 1421320545451. The reversal of 1421320545440 is 445450231241.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1420663751056 + 656794384 = 1191916^2 + 25628^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1421320545440.

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 3 ways as a sum of consecutive naturals, for example, 4441626545 + ... + 4441626864.

Almost surely, 2^{1421320545440} is an apocalyptic number.

1421320545440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421320545440 is an abundant number, since it is smaller than the sum of its proper divisors (1936549243540).

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

1421320545440 is an equidigital number, since it uses as much as digits as its factorization.

1421320545440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8883253424 (or 8883253416 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 1421320545440 its reverse (445450231241), we get a palindrome (1866770776681).

The spelling of 1421320545440 in words is "one trillion, four hundred twenty-one billion, three hundred twenty million, five hundred forty-five thousand, four hundred forty".