1340142143 has 4 divisors (see below), whose sum is σ = 1410675960. Its totient is φ = 1269608328.

The previous prime is 1340142131. The next prime is 1340142169. The reversal of 1340142143 is 3412410431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3412410431 = 19 ⋅179600549.

It is a cyclic number.

It is not a de Polignac number, because 1340142143 - 2¹⁸ = 1339879999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340142743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35266880 + ... + 35266917.

It is an arithmetic number, because the mean of its divisors is an integer number (352668990).

Almost surely, 2^1340142143 is an apocalyptic number.

1340142143 is a deficient number, since it is larger than the sum of its proper divisors (70533817).

1340142143 is an equidigital number, since it uses as much as digits as its factorization.

1340142143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70533816.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1340142143 is about 36607.9519093871. The cubic root of 1340142143 is about 1102.5127523922.

Adding to 1340142143 its reverse (3412410431), we get a palindrome (4752552574).

The spelling of 1340142143 in words is "one billion, three hundred forty million, one hundred forty-two thousand, one hundred forty-three".