1320272243 has 4 divisors (see below), whose sum is σ = 1377675408. Its totient is φ = 1262869080.

The previous prime is 1320272203. The next prime is 1320272281. The reversal of 1320272243 is 3422720231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1320272243 - 2²⁴ = 1303495027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320272203) 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, 28701548 + ... + 28701593.

It is an arithmetic number, because the mean of its divisors is an integer number (344418852).

Almost surely, 2^1320272243 is an apocalyptic number.

1320272243 is a deficient number, since it is larger than the sum of its proper divisors (57403165).

1320272243 is an equidigital number, since it uses as much as digits as its factorization.

1320272243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57403164.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 1320272243 is about 36335.5506769885. The cubic root of 1320272243 is about 1097.0367194536.

Adding to 1320272243 its reverse (3422720231), we get a palindrome (4742992474).

The spelling of 1320272243 in words is "one billion, three hundred twenty million, two hundred seventy-two thousand, two hundred forty-three".