1325865 has 16 divisors (see below), whose sum is σ = 2138688. Its totient is φ = 701376.

The previous prime is 1325861. The next prime is 1325867. The reversal of 1325865 is 5685231.

It is not a de Polignac number, because 1325865 - 2² = 1325861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1325861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2074 + ... + 2636.

It is an arithmetic number, because the mean of its divisors is an integer number (133668).

2^1325865 is an apocalyptic number.

1325865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1325865 is a deficient number, since it is larger than the sum of its proper divisors (812823).

1325865 is a wasteful number, since it uses less digits than its factorization.

1325865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its digits is 7200, while the sum is 30.

The square root of 1325865 is about 1151.4621140098. The cubic root of 1325865 is about 109.8583576363.

It can be divided in two parts, 13 and 25865, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 1325865 in words is "one million, three hundred twenty-five thousand, eight hundred sixty-five".