1206543 has 8 divisors (see below), whose sum is σ = 1732528. Its totient is φ = 742464.

The previous prime is 1206539. The next prime is 1206553. The reversal of 1206543 is 3456021.

It is a happy number.

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

It is not a de Polignac number, because 1206543 - 2² = 1206539 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 (1206553) 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, 15430 + ... + 15507.

It is an arithmetic number, because the mean of its divisors is an integer number (216566).

2^1206543 is an apocalyptic number.

1206543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1206543 is a deficient number, since it is larger than the sum of its proper divisors (525985).

1206543 is a wasteful number, since it uses less digits than its factorization.

1206543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30953.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1206543 is about 1098.4275124013. The cubic root of 1206543 is about 106.4586451440.

The spelling of 1206543 in words is "one million, two hundred six thousand, five hundred forty-three".