1320501243 has 8 divisors (see below), whose sum is σ = 1790510400. Its totient is φ = 865413128.

The previous prime is 1320501187. The next prime is 1320501289. The reversal of 1320501243 is 3421050231.

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 1320501243 - 2¹² = 1320497147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1320511243) 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, 3730053 + ... + 3730406.

It is an arithmetic number, because the mean of its divisors is an integer number (223813800).

Almost surely, 2^1320501243 is an apocalyptic number.

1320501243 is a deficient number, since it is larger than the sum of its proper divisors (470009157).

1320501243 is an equidigital number, since it uses as much as digits as its factorization.

1320501243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7460521.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1320501243 is about 36338.7017241948. The cubic root of 1320501243 is about 1097.1001424551.

Adding to 1320501243 its reverse (3421050231), we get a palindrome (4741551474).

The spelling of 1320501243 in words is "one billion, three hundred twenty million, five hundred one thousand, two hundred forty-three".