1340647 has 16 divisors (see below), whose sum is σ = 1746432. Its totient is φ = 997920.

The previous prime is 1340639. The next prime is 1340653. The reversal of 1340647 is 7460431.

It is not a de Polignac number, because 1340647 - 2³ = 1340639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1393 + ... + 2149.

It is an arithmetic number, because the mean of its divisors is an integer number (109152).

2^1340647 is an apocalyptic number.

1340647 is a deficient number, since it is larger than the sum of its proper divisors (405785).

1340647 is a wasteful number, since it uses less digits than its factorization.

1340647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 1340647 is about 1157.8631179893. The cubic root of 1340647 is about 110.2651180842.

The spelling of 1340647 in words is "one million, three hundred forty thousand, six hundred forty-seven".