1320897 has 8 divisors (see below), whose sum is σ = 1804320. Its totient is φ = 859040.

The previous prime is 1320889. The next prime is 1320901. The reversal of 1320897 is 7980231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1320897 - 2³ = 1320889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5247 + ... + 5492.

It is an arithmetic number, because the mean of its divisors is an integer number (225540).

2^1320897 is an apocalyptic number.

It is an amenable number.

1320897 is a deficient number, since it is larger than the sum of its proper divisors (483423).

1320897 is a wasteful number, since it uses less digits than its factorization.

1320897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10783.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 1320897 is about 1149.3028321552. The cubic root of 1320897 is about 109.7209732581.

It can be divided in two parts, 13 and 20897, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 1320897 in words is "one million, three hundred twenty thousand, eight hundred ninety-seven".