1320442243 has 8 divisors (see below), whose sum is σ = 1344936960. Its totient is φ = 1296018120.

The previous prime is 1320442219. The next prime is 1320442267. The reversal of 1320442243 is 3422440231.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1320442219) and next prime (1320442267).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320442243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320442283) 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, 20878 + ... + 55468.

It is an arithmetic number, because the mean of its divisors is an integer number (168117120).

Almost surely, 2^1320442243 is an apocalyptic number.

1320442243 is a deficient number, since it is larger than the sum of its proper divisors (24494717).

1320442243 is an equidigital number, since it uses as much as digits as its factorization.

1320442243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35297.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 1320442243 is about 36337.8899084688. The cubic root of 1320442243 is about 1097.0838027324.

Adding to 1320442243 its reverse (3422440231), we get a palindrome (4742882474).

The spelling of 1320442243 in words is "one billion, three hundred twenty million, four hundred forty-two thousand, two hundred forty-three".