1340864 has 56 divisors (see below), whose sum is σ = 3157728. Its totient is φ = 552960.

The previous prime is 1340861. The next prime is 1340879. The reversal of 1340864 is 4680431.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340861) 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, 18332 + ... + 18404.

It is an arithmetic number, because the mean of its divisors is an integer number (56388).

2^1340864 is an apocalyptic number.

1340864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1340864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578864).

1340864 is an abundant number, since it is smaller than the sum of its proper divisors (1816864).

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

1340864 is an equidigital number, since it uses as much as digits as its factorization.

1340864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1340864 is about 1157.9568213021. The cubic root of 1340864 is about 110.2710670128.

The spelling of 1340864 in words is "one million, three hundred forty thousand, eight hundred sixty-four".