1320965 has 8 divisors (see below), whose sum is σ = 1591800. Its totient is φ = 1052352.

The previous prime is 1320961. The next prime is 1320973. The reversal of 1320965 is 5690231.

It can be written as a sum of positive squares in 4 ways, for example, as 306916 + 1014049 = 554^2 + 1007^2 .

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 1320965 - 2² = 1320961 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320961) 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, 1367 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (198975).

2^1320965 is an apocalyptic number.

It is an amenable number.

1320965 is a deficient number, since it is larger than the sum of its proper divisors (270835).

1320965 is an equidigital number, since it uses as much as digits as its factorization.

1320965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 1320965 is about 1149.3324149262. The cubic root of 1320965 is about 109.7228560439.

The spelling of 1320965 in words is "one million, three hundred twenty thousand, nine hundred sixty-five".