1321006 has 4 divisors (see below), whose sum is σ = 1981512. Its totient is φ = 660502.

The previous prime is 1320983. The next prime is 1321007. The reversal of 1321006 is 6001231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6001231 = 29 ⋅206939.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330250 + ... + 330253.

It is an arithmetic number, because the mean of its divisors is an integer number (495378).

2^1321006 is an apocalyptic number.

1321006 is a deficient number, since it is larger than the sum of its proper divisors (660506).

1321006 is an equidigital number, since it uses as much as digits as its factorization.

1321006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660505.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1321006 is about 1149.3502512289. The cubic root of 1321006 is about 109.7239912217.

Adding to 1321006 its reverse (6001231), we get a palindrome (7322237).

The spelling of 1321006 in words is "one million, three hundred twenty-one thousand, six".