1340422043 has 4 divisors (see below), whose sum is σ = 1340573520. Its totient is φ = 1340270568.

The previous prime is 1340422007. The next prime is 1340422049. The reversal of 1340422043 is 3402240431.

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 1340422043 - 2⁸ = 1340421787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340422049) 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, 61583 + ... + 80456.

It is an arithmetic number, because the mean of its divisors is an integer number (335143380).

Almost surely, 2^1340422043 is an apocalyptic number.

1340422043 is a deficient number, since it is larger than the sum of its proper divisors (151477).

1340422043 is an equidigital number, since it uses as much as digits as its factorization.

1340422043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151476.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 1340422043 is about 36611.7746496943. The cubic root of 1340422043 is about 1102.5895034143.

Adding to 1340422043 its reverse (3402240431), we get a palindrome (4742662474).

The spelling of 1340422043 in words is "one billion, three hundred forty million, four hundred twenty-two thousand, forty-three".