1300840 has 32 divisors (see below), whose sum is σ = 3100680. Its totient is φ = 489472.

The previous prime is 1300837. The next prime is 1300841. The reversal of 1300840 is 480031.

It can be written as a sum of positive squares in 4 ways, for example, as 1285956 + 14884 = 1134^2 + 122^2 .

It is not an unprimeable number, because it can be changed into a prime (1300841) 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 7 ways as a sum of consecutive naturals, for example, 277 + ... + 1636.

2^1300840 is an apocalyptic number.

1300840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1300840 is an abundant number, since it is smaller than the sum of its proper divisors (1799840).

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

1300840 is a wasteful number, since it uses less digits than its factorization.

1300840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1941 (or 1937 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1300840 is about 1140.5437299815. The cubic root of 1300840 is about 109.1627901685.

Adding to 1300840 its reverse (480031), we get a palindrome (1780871).

The spelling of 1300840 in words is "one million, three hundred thousand, eight hundred forty".