1340422042 has 4 divisors (see below), whose sum is σ = 2010633066. Its totient is φ = 670211020.

The previous prime is 1340422007. The next prime is 1340422049. The reversal of 1340422042 is 2402240431.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 688590081 + 651831961 = 26241^2 + 25531^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1340422049) 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 as a sum of consecutive naturals, namely, 335105509 + ... + 335105512.

Almost surely, 2^1340422042 is an apocalyptic number.

1340422042 is a deficient number, since it is larger than the sum of its proper divisors (670211024).

1340422042 is an equidigital number, since it uses as much as digits as its factorization.

1340422042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670211023.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 1340422042 is about 36611.7746360375. The cubic root of 1340422042 is about 1102.5895031401.

Adding to 1340422042 its reverse (2402240431), we get a palindrome (3742662473).

The spelling of 1340422042 in words is "one billion, three hundred forty million, four hundred twenty-two thousand, forty-two".