1340645422 has 4 divisors (see below), whose sum is σ = 2010968136. Its totient is φ = 670322710.

The previous prime is 1340645407. The next prime is 1340645477. The reversal of 1340645422 is 2245460431.

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

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335161354 + ... + 335161357.

It is an arithmetic number, because the mean of its divisors is an integer number (502742034).

Almost surely, 2^1340645422 is an apocalyptic number.

1340645422 is a deficient number, since it is larger than the sum of its proper divisors (670322714).

1340645422 is an equidigital number, since it uses as much as digits as its factorization.

1340645422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670322713.

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 1340645422 is about 36614.8251668638. The cubic root of 1340645422 is about 1102.6507482194.

The spelling of 1340645422 in words is "one billion, three hundred forty million, six hundred forty-five thousand, four hundred twenty-two".