1320869 has 4 divisors (see below), whose sum is σ = 1440960. Its totient is φ = 1200780.

The previous prime is 1320859. The next prime is 1320871. The reversal of 1320869 is 9680231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9680231 = 11 ⋅880021.

It is a cyclic number.

It is not a de Polignac number, because 1320869 - 2¹⁶ = 1255333 is a prime.

It is a super-2 number, since 2×1320869² = 3489389830322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320859) 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, 60029 + ... + 60050.

It is an arithmetic number, because the mean of its divisors is an integer number (360240).

2^1320869 is an apocalyptic number.

It is an amenable number.

1320869 is a deficient number, since it is larger than the sum of its proper divisors (120091).

1320869 is a wasteful number, since it uses less digits than its factorization.

1320869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120090.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 1320869 is about 1149.2906507929. The cubic root of 1320869 is about 109.7201979746.

The spelling of 1320869 in words is "one million, three hundred twenty thousand, eight hundred sixty-nine".