1300640 has 48 divisors (see below), whose sum is σ = 3356640. Its totient is φ = 472320.

The previous prime is 1300639. The next prime is 1300669. The reversal of 1300640 is 460031.

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, 1391 + ... + 2129.

It is an arithmetic number, because the mean of its divisors is an integer number (69930).

2^1300640 is an apocalyptic number.

1300640 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 1300640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1678320).

1300640 is an abundant number, since it is smaller than the sum of its proper divisors (2056000).

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

1300640 is a wasteful number, since it uses less digits than its factorization.

1300640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 757 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1300640 is about 1140.4560491312. The cubic root of 1300640 is about 109.1571954049.

Adding to 1300640 its reverse (460031), we get a palindrome (1760671).

The spelling of 1300640 in words is "one million, three hundred thousand, six hundred forty".