1321797 has 8 divisors (see below), whose sum is σ = 1767744. Its totient is φ = 878528.

The previous prime is 1321769. The next prime is 1321813. The reversal of 1321797 is 7971231.

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 1321797 - 2⁷ = 1321669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321757) 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, 1408 + ... + 2150.

It is an arithmetic number, because the mean of its divisors is an integer number (220968).

2^1321797 is an apocalyptic number.

It is an amenable number.

1321797 is a deficient number, since it is larger than the sum of its proper divisors (445947).

1321797 is an equidigital number, since it uses as much as digits as its factorization.

1321797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1339.

The product of its digits is 2646, while the sum is 30.

The square root of 1321797 is about 1149.6943071965. The cubic root of 1321797 is about 109.7458872513.

The spelling of 1321797 in words is "one million, three hundred twenty-one thousand, seven hundred ninety-seven".