1320723 has 12 divisors (see below), whose sum is σ = 1918488. Its totient is φ = 875520.

The previous prime is 1320721. The next prime is 1320727. The reversal of 1320723 is 3270231.

It is not a de Polignac number, because 1320723 - 2¹ = 1320721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1320696 and 1320705.

It is not an unprimeable number, because it can be changed into a prime (1320721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2028 + ... + 2598.

It is an arithmetic number, because the mean of its divisors is an integer number (159874).

2^1320723 is an apocalyptic number.

1320723 is a deficient number, since it is larger than the sum of its proper divisors (597765).

1320723 is a wasteful number, since it uses less digits than its factorization.

1320723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834 (or 831 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 1320723 is about 1149.2271315976. The cubic root of 1320723 is about 109.7161552474.

Adding to 1320723 its reverse (3270231), we get a palindrome (4590954).

It can be divided in two parts, 13 and 20723, that added together give a 4-th power (20736 = 12⁴).

The spelling of 1320723 in words is "one million, three hundred twenty thousand, seven hundred twenty-three".