1243320135 has 16 divisors (see below), whose sum is σ = 1991527296. Its totient is φ = 662365728.

The previous prime is 1243320079. The next prime is 1243320151. The reversal of 1243320135 is 5310233421.

1243320135 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1243320135 - 2²⁵ = 1209765703 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32089 + ... + 59298.

It is an arithmetic number, because the mean of its divisors is an integer number (124470456).

Almost surely, 2^1243320135 is an apocalyptic number.

1243320135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1243320135 is a deficient number, since it is larger than the sum of its proper divisors (748207161).

1243320135 is an equidigital number, since it uses as much as digits as its factorization.

1243320135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92302.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1243320135 is about 35260.7449580975. The cubic root of 1243320135 is about 1075.2950724156.

Adding to 1243320135 its reverse (5310233421), we get a palindrome (6553553556).

The spelling of 1243320135 in words is "one billion, two hundred forty-three million, three hundred twenty thousand, one hundred thirty-five".