1340280 has 128 divisors (see below), whose sum is σ = 4795200. Its totient is φ = 331776.

The previous prime is 1340243. The next prime is 1340281. The reversal of 1340280 is 820431.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340281) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 18324 + ... + 18396.

2^1340280 is an apocalyptic number.

1340280 is a gapful number since it is divisible by the number (10) 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 1340280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2397600).

1340280 is an abundant number, since it is smaller than the sum of its proper divisors (3454920).

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

1340280 is a wasteful number, since it uses less digits than its factorization.

1340280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1340280 is about 1157.7046255414. The cubic root of 1340280 is about 110.2550555320.

The spelling of 1340280 in words is "one million, three hundred forty thousand, two hundred eighty".