1325666 has 4 divisors (see below), whose sum is σ = 1988502. Its totient is φ = 662832.

The previous prime is 1325663. The next prime is 1325669. The reversal of 1325666 is 6665231.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1325663) and next prime (1325669).

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 14641 = 1145^2 + 121^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1325663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331415 + ... + 331418.

2^1325666 is an apocalyptic number.

1325666 is a deficient number, since it is larger than the sum of its proper divisors (662836).

1325666 is an equidigital number, since it uses as much as digits as its factorization.

1325666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662835.

The product of its digits is 6480, while the sum is 29.

The square root of 1325666 is about 1151.3756988924. The cubic root of 1325666 is about 109.8528611222.

It can be divided in two parts, 1325 and 666, that added together give a palindrome (1991).

The spelling of 1325666 in words is "one million, three hundred twenty-five thousand, six hundred sixty-six".