1200403243 has 8 divisors (see below), whose sum is σ = 1293869808. Its totient is φ = 1107097824.

The previous prime is 1200403241. The next prime is 1200403249. The reversal of 1200403243 is 3423040021.

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 1200403243 - 2¹ = 1200403241 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 1200403243.

It is not an unprimeable number, because it can be changed into a prime (1200403241) 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, 24580 + ... + 54817.

It is an arithmetic number, because the mean of its divisors is an integer number (161733726).

Almost surely, 2^1200403243 is an apocalyptic number.

1200403243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1200403243 is a deficient number, since it is larger than the sum of its proper divisors (93466565).

1200403243 is a wasteful number, since it uses less digits than its factorization.

1200403243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80573.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 1200403243 is about 34646.8359738664. The cubic root of 1200403243 is about 1062.7775863049. Note that the first 3 decimals are identical.

Adding to 1200403243 its reverse (3423040021), we get a palindrome (4623443264).

The spelling of 1200403243 in words is "one billion, two hundred million, four hundred three thousand, two hundred forty-three".