1213269543 has 8 divisors (see below), whose sum is σ = 1797436400. Its totient is φ = 808846344.

The previous prime is 1213269523. The next prime is 1213269557. The reversal of 1213269543 is 3459623121.

1213269543 is a `hidden beast` number, since 1 + 21 + 32 + 69 + 543 = 666.

It is not a de Polignac number, because 1213269543 - 2⁵ = 1213269511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1213269498 and 1213269507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213269523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22467928 + ... + 22467981.

It is an arithmetic number, because the mean of its divisors is an integer number (224679550).

Almost surely, 2^1213269543 is an apocalyptic number.

1213269543 is a deficient number, since it is larger than the sum of its proper divisors (584166857).

1213269543 is an equidigital number, since it uses as much as digits as its factorization.

1213269543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44935918 (or 44935912 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 1213269543 is about 34832.0189337339. The cubic root of 1213269543 is about 1066.5611621017.

The spelling of 1213269543 in words is "one billion, two hundred thirteen million, two hundred sixty-nine thousand, five hundred forty-three".