1320566 has 12 divisors (see below), whose sum is σ = 2145492. Its totient is φ = 609336.

The previous prime is 1320541. The next prime is 1320607. The reversal of 1320566 is 6650231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1616 + ... + 2291.

It is an arithmetic number, because the mean of its divisors is an integer number (178791).

2^1320566 is an apocalyptic number.

1320566 is a deficient number, since it is larger than the sum of its proper divisors (824926).

1320566 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 8 representation: 1320566 = (5023166)₈.

1320566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935 (or 3922 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1320566 is about 1149.1588227917. The cubic root of 1320566 is about 109.7118075987.

Adding to 1320566 its reverse (6650231), we get a palindrome (7970797).

The spelling of 1320566 in words is "one million, three hundred twenty thousand, five hundred sixty-six".