1320679 has 4 divisors (see below), whose sum is σ = 1398384. Its totient is φ = 1242976.

The previous prime is 1320667. The next prime is 1320721. The reversal of 1320679 is 9760231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9760231 = 13 ⋅750787.

It is a cyclic number.

It is not a de Polignac number, because 1320679 - 2¹⁷ = 1189607 is a prime.

It is a Duffinian number.

1320679 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38827 + ... + 38860.

It is an arithmetic number, because the mean of its divisors is an integer number (349596).

2^1320679 is an apocalyptic number.

1320679 is a deficient number, since it is larger than the sum of its proper divisors (77705).

1320679 is an equidigital number, since it uses as much as digits as its factorization.

1320679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77704.

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

The square root of 1320679 is about 1149.2079881379. The cubic root of 1320679 is about 109.7149368328.

The spelling of 1320679 in words is "one million, three hundred twenty thousand, six hundred seventy-nine".