1213265343 has 4 divisors (see below), whose sum is σ = 1617687128. Its totient is φ = 808843560.

The previous prime is 1213265323. The next prime is 1213265351. The reversal of 1213265343 is 3435623121.

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

It is not a de Polignac number, because 1213265343 - 2⁹ = 1213264831 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1213265343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213265303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202210888 + ... + 202210893.

It is an arithmetic number, because the mean of its divisors is an integer number (404421782).

Almost surely, 2^1213265343 is an apocalyptic number.

1213265343 is a deficient number, since it is larger than the sum of its proper divisors (404421785).

1213265343 is an equidigital number, since it uses as much as digits as its factorization.

1213265343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404421784.

The product of its digits is 12960, while the sum is 30.

The square root of 1213265343 is about 34831.9586443255. The cubic root of 1213265343 is about 1066.5599313881.

Adding to 1213265343 its reverse (3435623121), we get a palindrome (4648888464).

The spelling of 1213265343 in words is "one billion, two hundred thirteen million, two hundred sixty-five thousand, three hundred forty-three".