1200543 has 8 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 794328.

The previous prime is 1200527. The next prime is 1200581. The reversal of 1200543 is 3450021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200543 - 2⁴ = 1200527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200583) 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, 1023 + ... + 1856.

It is an arithmetic number, because the mean of its divisors is an integer number (201600).

2^1200543 is an apocalyptic number.

1200543 is a deficient number, since it is larger than the sum of its proper divisors (412257).

1200543 is a wasteful number, since it uses less digits than its factorization.

1200543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1200543 is about 1095.6929314365. The cubic root of 1200543 is about 106.2818829347.

Adding to 1200543 its reverse (3450021), we get a palindrome (4650564).

The spelling of 1200543 in words is "one million, two hundred thousand, five hundred forty-three".