1320263 has 4 divisors (see below), whose sum is σ = 1508880. Its totient is φ = 1131648.

The previous prime is 1320251. The next prime is 1320287. The reversal of 1320263 is 3620231.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1320263 - 2⁴ = 1320247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325263) 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, 94298 + ... + 94311.

It is an arithmetic number, because the mean of its divisors is an integer number (377220).

2^1320263 is an apocalyptic number.

1320263 is a deficient number, since it is larger than the sum of its proper divisors (188617).

1320263 is an equidigital number, since it uses as much as digits as its factorization.

1320263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188616.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1320263 is about 1149.0269796658. The cubic root of 1320263 is about 109.7034159392.

Adding to 1320263 its reverse (3620231), we get a palindrome (4940494).

Subtracting 1320263 from its reverse (3620231), we obtain a cube (2299968 = 132³).

The spelling of 1320263 in words is "one million, three hundred twenty thousand, two hundred sixty-three".