1340646 has 8 divisors (see below), whose sum is σ = 2681304. Its totient is φ = 446880.

The previous prime is 1340639. The next prime is 1340653. The reversal of 1340646 is 6460431.

It is an interprime number because it is at equal distance from previous prime (1340639) and next prime (1340653).

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

1340646 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111715 + ... + 111726.

It is an arithmetic number, because the mean of its divisors is an integer number (335163).

2^1340646 is an apocalyptic number.

1340646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1340646 is a wasteful number, since it uses less digits than its factorization.

1340646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223446.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1340646 is about 1157.8626861593. The cubic root of 1340646 is about 110.2650906683.

The spelling of 1340646 in words is "one million, three hundred forty thousand, six hundred forty-six".