1340256 has 48 divisors (see below), whose sum is σ = 3677184. Its totient is φ = 426624.

The previous prime is 1340243. The next prime is 1340281. The reversal of 1340256 is 6520431.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1340256² = 3592572291072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1905 + ... + 2511.

It is an arithmetic number, because the mean of its divisors is an integer number (76608).

2^1340256 is an apocalyptic number.

1340256 is a gapful number since it is divisible by the number (16) 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 1340256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838592).

1340256 is an abundant number, since it is smaller than the sum of its proper divisors (2336928).

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

1340256 is a wasteful number, since it uses less digits than its factorization.

1340256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1340256 is about 1157.6942601568. The cubic root of 1340256 is about 110.2543974264.

Adding to 1340256 its reverse (6520431), we get a palindrome (7860687).

It can be divided in two parts, 1340 and 256, that added together give a triangular number (1596 = T₅₆).

The spelling of 1340256 in words is "one million, three hundred forty thousand, two hundred fifty-six".