1340143 has 4 divisors (see below), whose sum is σ = 1531600. Its totient is φ = 1148688.

The previous prime is 1340113. The next prime is 1340149. The reversal of 1340143 is 3410431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340143 - 2⁹ = 1339631 is a prime.

1340143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95718 + ... + 95731.

It is an arithmetic number, because the mean of its divisors is an integer number (382900).

2^1340143 is an apocalyptic number.

1340143 is a deficient number, since it is larger than the sum of its proper divisors (191457).

1340143 is an equidigital number, since it uses as much as digits as its factorization.

1340143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191456.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1340143 is about 1157.6454552237. The cubic root of 1340143 is about 110.2512987405.

Adding to 1340143 its reverse (3410431), we get a palindrome (4750574).

The spelling of 1340143 in words is "one million, three hundred forty thousand, one hundred forty-three".