1340420421040 has 20 divisors (see below), whose sum is σ = 3116477479104. Its totient is φ = 536168168384.

The previous prime is 1340420420981. The next prime is 1340420421059. The reversal of 1340420421040 is 401240240431.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 1340420420996 and 1340420421014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8377627552 + ... + 8377627711.

Almost surely, 2^{1340420421040} is an apocalyptic number.

1340420421040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1340420421040 is an abundant number, since it is smaller than the sum of its proper divisors (1776057058064).

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

1340420421040 is a wasteful number, since it uses less digits than its factorization.

1340420421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16755255276 (or 16755255270 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 1340420421040 its reverse (401240240431), we get a palindrome (1741660661471).

The spelling of 1340420421040 in words is "one trillion, three hundred forty billion, four hundred twenty million, four hundred twenty-one thousand, forty".