1340705 has 8 divisors (see below), whose sum is σ = 1703592. Its totient is φ = 1009408.

The previous prime is 1340701. The next prime is 1340707. The reversal of 1340705 is 5070431.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 322624 + 1018081 = 568^2 + 1009^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1340705 - 2² = 1340701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1340701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7802 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (212949).

2^1340705 is an apocalyptic number.

It is an amenable number.

1340705 is a deficient number, since it is larger than the sum of its proper divisors (362887).

1340705 is a wasteful number, since it uses less digits than its factorization.

1340705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15795.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 1340705 is about 1157.8881638569. Note that the first 3 decimals coincide. The cubic root of 1340705 is about 110.2667081833.

The spelling of 1340705 in words is "one million, three hundred forty thousand, seven hundred five".