1323865 has 8 divisors (see below), whose sum is σ = 1600200. Its totient is φ = 1051392.

The previous prime is 1323851. The next prime is 1323869. The reversal of 1323865 is 5683231.

It can be written as a sum of positive squares in 4 ways, for example, as 15129 + 1308736 = 123^2 + 1144^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1323865 - 2⁷ = 1323737 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144 + ... + 1633.

It is an arithmetic number, because the mean of its divisors is an integer number (200025).

2^1323865 is an apocalyptic number.

It is an amenable number.

1323865 is a deficient number, since it is larger than the sum of its proper divisors (276335).

1323865 is a wasteful number, since it uses less digits than its factorization.

1323865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1931.

The product of its digits is 4320, while the sum is 28.

The square root of 1323865 is about 1150.5933252023. The cubic root of 1323865 is about 109.8030912542.

The spelling of 1323865 in words is "one million, three hundred twenty-three thousand, eight hundred sixty-five".