1451421531440 has 40 divisors (see below), whose sum is σ = 3375023858160. Its totient is φ = 580487959296.

The previous prime is 1451421531383. The next prime is 1451421531529. The reversal of 1451421531440 is 441351241541.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 1451421531440.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 679079 + ... + 1834118.

It is an arithmetic number, because the mean of its divisors is an integer number (84375596454).

Almost surely, 2^{1451421531440} is an apocalyptic number.

1451421531440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1451421531440 is an abundant number, since it is smaller than the sum of its proper divisors (1923602326720).

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

1451421531440 is a wasteful number, since it uses less digits than its factorization.

1451421531440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2520429 (or 2520423 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 35.

Adding to 1451421531440 its reverse (441351241541), we get a palindrome (1892772772981).

The spelling of 1451421531440 in words is "one trillion, four hundred fifty-one billion, four hundred twenty-one million, five hundred thirty-one thousand, four hundred forty".