1320281 has 4 divisors (see below), whose sum is σ = 1336272. Its totient is φ = 1304292.

The previous prime is 1320251. The next prime is 1320287. The reversal of 1320281 is 1820231.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320281 is a prime.

It is a super-2 number, since 2×1320281² = 3486283837922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320287) 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, 7871 + ... + 8036.

It is an arithmetic number, because the mean of its divisors is an integer number (334068).

2^1320281 is an apocalyptic number.

It is an amenable number.

1320281 is a deficient number, since it is larger than the sum of its proper divisors (15991).

1320281 is an equidigital number, since it uses as much as digits as its factorization.

1320281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15990.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1320281 is about 1149.0348123534. The cubic root of 1320281 is about 109.7039144895.

The spelling of 1320281 in words is "one million, three hundred twenty thousand, two hundred eighty-one".