1303666 has 48 divisors (see below), whose sum is σ = 2635200. Its totient is φ = 471744.

The previous prime is 1303633. The next prime is 1303667. The reversal of 1303666 is 6663031.

It is a self number, because there is not a number n which added to its sum of digits gives 1303666.

It is not an unprimeable number, because it can be changed into a prime (1303667) 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 23 ways as a sum of consecutive naturals, for example, 44940 + ... + 44968.

It is an arithmetic number, because the mean of its divisors is an integer number (54900).

2^1303666 is an apocalyptic number.

1303666 is an abundant number, since it is smaller than the sum of its proper divisors (1331534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1303666 is a wasteful number, since it uses less digits than its factorization.

1303666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 1303666 is about 1141.7819406524. The cubic root of 1303666 is about 109.2417829524.

Adding to 1303666 its reverse (6663031), we get a palindrome (7966697).

The spelling of 1303666 in words is "one million, three hundred three thousand, six hundred sixty-six".