1325840 has 20 divisors (see below), whose sum is σ = 3082764. Its totient is φ = 530304.

The previous prime is 1325803. The next prime is 1325861. The reversal of 1325840 is 485231.

It can be written as a sum of positive squares in 2 ways, for example, as 692224 + 633616 = 832^2 + 796^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8207 + ... + 8366.

2^1325840 is an apocalyptic number.

1325840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1325840 is an abundant number, since it is smaller than the sum of its proper divisors (1756924).

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

1325840 is a wasteful number, since it uses less digits than its factorization.

1325840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16586 (or 16580 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1325840 is about 1151.4512581955. The cubic root of 1325840 is about 109.8576671496.

The spelling of 1325840 in words is "one million, three hundred twenty-five thousand, eight hundred forty".