1340443001 has 4 divisors (see below), whose sum is σ = 1340524404. Its totient is φ = 1340361600.

The previous prime is 1340442991. The next prime is 1340443019. The reversal of 1340443001 is 1003440431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1043225401 + 297217600 = 32299^2 + 17240^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340443001 - 2²⁶ = 1273334137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340443021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6320 + ... + 52161.

It is an arithmetic number, because the mean of its divisors is an integer number (335131101).

Almost surely, 2^1340443001 is an apocalyptic number.

It is an amenable number.

1340443001 is a deficient number, since it is larger than the sum of its proper divisors (81403).

1340443001 is an equidigital number, since it uses as much as digits as its factorization.

1340443001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81402.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1340443001 is about 36612.0608679708. The cubic root of 1340443001 is about 1102.5952498508.

Adding to 1340443001 its reverse (1003440431), we get a palindrome (2343883432).

The spelling of 1340443001 in words is "one billion, three hundred forty million, four hundred forty-three thousand, one".