1340440143 has 8 divisors (see below), whose sum is σ = 2042575488. Its totient is φ = 765965784.

The previous prime is 1340440121. The next prime is 1340440151. The reversal of 1340440143 is 3410440431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1340440143 - 2⁵ = 1340440111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340440103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31915221 + ... + 31915262.

It is an arithmetic number, because the mean of its divisors is an integer number (255321936).

Almost surely, 2^1340440143 is an apocalyptic number.

1340440143 is a deficient number, since it is larger than the sum of its proper divisors (702135345).

1340440143 is an equidigital number, since it uses as much as digits as its factorization.

1340440143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63830493.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1340440143 is about 36612.0218370961. The cubic root of 1340440143 is about 1102.5944662244.

Adding to 1340440143 its reverse (3410440431), we get a palindrome (4750880574).

The spelling of 1340440143 in words is "one billion, three hundred forty million, four hundred forty thousand, one hundred forty-three".