1325989 has 6 divisors (see below), whose sum is σ = 1542534. Its totient is φ = 1136520.

The previous prime is 1325977. The next prime is 1325993. The reversal of 1325989 is 9895231.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 432964 = 945^2 + 658^2 .

It is not a de Polignac number, because 1325989 - 2⁷ = 1325861 is a prime.

It is a d-powerful number, because it can be written as 1 + 3¹² + 2⁸ + 5⁴ + 9² + 8⁶ + 9⁶ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325939) 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 5 ways as a sum of consecutive naturals, for example, 13482 + ... + 13579.

It is an arithmetic number, because the mean of its divisors is an integer number (257089).

2^1325989 is an apocalyptic number.

It is an amenable number.

1325989 is a deficient number, since it is larger than the sum of its proper divisors (216545).

1325989 is an equidigital number, since it uses as much as digits as its factorization.

1325989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27075 (or 27068 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 1325989 is about 1151.5159573362. The cubic root of 1325989 is about 109.8617823217.

The spelling of 1325989 in words is "one million, three hundred twenty-five thousand, nine hundred eighty-nine".