1325815 has 4 divisors (see below), whose sum is σ = 1590984. Its totient is φ = 1060648.

The previous prime is 1325803. The next prime is 1325861. The reversal of 1325815 is 5185231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5185231 = 113 ⋅45887.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1325815 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1325815.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132577 + ... + 132586.

It is an arithmetic number, because the mean of its divisors is an integer number (397746).

2^1325815 is an apocalyptic number.

1325815 is a deficient number, since it is larger than the sum of its proper divisors (265169).

1325815 is an equidigital number, since it uses as much as digits as its factorization.

1325815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265168.

The product of its digits is 1200, while the sum is 25.

The square root of 1325815 is about 1151.4404022788. The cubic root of 1325815 is about 109.8569766543.

The spelling of 1325815 in words is "one million, three hundred twenty-five thousand, eight hundred fifteen".