1226729543 has 8 divisors (see below), whose sum is σ = 1321748736. Its totient is φ = 1131804000.

The previous prime is 1226729533. The next prime is 1226729549. The reversal of 1226729543 is 3459276221.

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 1226729543 - 2⁴ = 1226729527 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 1226729543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1226729549) 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, 5093 + ... + 49793.

It is an arithmetic number, because the mean of its divisors is an integer number (165218592).

Almost surely, 2^1226729543 is an apocalyptic number.

1226729543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1226729543 is a deficient number, since it is larger than the sum of its proper divisors (95019193).

1226729543 is a wasteful number, since it uses less digits than its factorization.

1226729543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46825.

The product of its digits is 181440, while the sum is 41.

The square root of 1226729543 is about 35024.6990422473. The cubic root of 1226729543 is about 1070.4908054924.

The spelling of 1226729543 in words is "one billion, two hundred twenty-six million, seven hundred twenty-nine thousand, five hundred forty-three".