1200350643 has 4 divisors (see below), whose sum is σ = 1600467528. Its totient is φ = 800233760.

The previous prime is 1200350623. The next prime is 1200350663. The reversal of 1200350643 is 3460530021.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1200350623) and next prime (1200350663).

It is a cyclic number.

It is not a de Polignac number, because 1200350643 - 2⁶ = 1200350579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200350623) 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, 200058438 + ... + 200058443.

It is an arithmetic number, because the mean of its divisors is an integer number (400116882).

Almost surely, 2^1200350643 is an apocalyptic number.

1200350643 is a deficient number, since it is larger than the sum of its proper divisors (400116885).

1200350643 is an equidigital number, since it uses as much as digits as its factorization.

1200350643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400116884.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 1200350643 is about 34646.0768774763. The cubic root of 1200350643 is about 1062.7620629331.

Adding to 1200350643 its reverse (3460530021), we get a palindrome (4660880664).

The spelling of 1200350643 in words is "one billion, two hundred million, three hundred fifty thousand, six hundred forty-three".