1320406 has 16 divisors (see below), whose sum is σ = 2053440. Its totient is φ = 636480.

The previous prime is 1320391. The next prime is 1320409. The reversal of 1320406 is 6040231.

It is a self number, because there is not a number n which added to its sum of digits gives 1320406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320409) 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, 9570 + ... + 9706.

It is an arithmetic number, because the mean of its divisors is an integer number (128340).

2^1320406 is an apocalyptic number.

1320406 is a deficient number, since it is larger than the sum of its proper divisors (733034).

1320406 is a wasteful number, since it uses less digits than its factorization.

1320406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1320406 is about 1149.0892045442. The cubic root of 1320406 is about 109.7073765193.

Adding to 1320406 its reverse (6040231), we get a palindrome (7360637).

The spelling of 1320406 in words is "one million, three hundred twenty thousand, four hundred six".