1320523 has 4 divisors (see below), whose sum is σ = 1325808. Its totient is φ = 1315240.

The previous prime is 1320437. The next prime is 1320533. The reversal of 1320523 is 3250231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3250231 = 761 ⋅4271.

It is a cyclic number.

It is not a de Polignac number, because 1320523 - 2¹³ = 1312331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320497 and 1320506.

It is not an unprimeable number, because it can be changed into a prime (1320533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2248 + ... + 2773.

It is an arithmetic number, because the mean of its divisors is an integer number (331452).

2^1320523 is an apocalyptic number.

1320523 is a deficient number, since it is larger than the sum of its proper divisors (5285).

1320523 is an equidigital number, since it uses as much as digits as its factorization.

1320523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5284.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 1320523 is about 1149.1401133021. The cubic root of 1320523 is about 109.7106167813.

Adding to 1320523 its reverse (3250231), we get a palindrome (4570754).

The spelling of 1320523 in words is "one million, three hundred twenty thousand, five hundred twenty-three".