1200540343 has 4 divisors (see below), whose sum is σ = 1201239648. Its totient is φ = 1199841040.

The previous prime is 1200540337. The next prime is 1200540353. The reversal of 1200540343 is 3430450021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200540343 - 2¹⁷ = 1200409271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200540353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347071 + ... + 350512.

It is an arithmetic number, because the mean of its divisors is an integer number (300309912).

Almost surely, 2^1200540343 is an apocalyptic number.

1200540343 is a deficient number, since it is larger than the sum of its proper divisors (699305).

1200540343 is an equidigital number, since it uses as much as digits as its factorization.

1200540343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699304.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 1200540343 is about 34648.8144530228. The cubic root of 1200540343 is about 1062.8180452815.

Adding to 1200540343 its reverse (3430450021), we get a palindrome (4630990364).

The spelling of 1200540343 in words is "one billion, two hundred million, five hundred forty thousand, three hundred forty-three".