1340681942 has 8 divisors (see below), whose sum is σ = 2013505032. Its totient is φ = 669513600.

The previous prime is 1340681941. The next prime is 1340681981. The reversal of 1340681942 is 2491860431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1340681896 and 1340681905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340681941) 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, 411659 + ... + 414902.

It is an arithmetic number, because the mean of its divisors is an integer number (251688129).

Almost surely, 2^1340681942 is an apocalyptic number.

1340681942 is a deficient number, since it is larger than the sum of its proper divisors (672823090).

1340681942 is an equidigital number, since it uses as much as digits as its factorization.

1340681942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827374.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1340681942 is about 36615.3238685663. The cubic root of 1340681942 is about 1102.6607604217.

The spelling of 1340681942 in words is "one billion, three hundred forty million, six hundred eighty-one thousand, nine hundred forty-two".