1320769 has 4 divisors (see below), whose sum is σ = 1333696. Its totient is φ = 1307844.

The previous prime is 1320751. The next prime is 1320773. The reversal of 1320769 is 9670231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1320769 - 2¹¹ = 1318721 is a prime.

It is a super-2 number, since 2×1320769² = 3488861502722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320749) 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, 6309 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (333424).

2^1320769 is an apocalyptic number.

It is an amenable number.

1320769 is a deficient number, since it is larger than the sum of its proper divisors (12927).

1320769 is a wasteful number, since it uses less digits than its factorization.

1320769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12926.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 1320769 is about 1149.2471448735. The cubic root of 1320769 is about 109.7174290155.

The spelling of 1320769 in words is "one million, three hundred twenty thousand, seven hundred sixty-nine".