1200004431 has 4 divisors (see below), whose sum is σ = 1600005912. Its totient is φ = 800002952.

The previous prime is 1200004417. The next prime is 1200004433. The reversal of 1200004431 is 1344000021.

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 1200004431 - 2⁶ = 1200004367 is a prime.

It is a super-2 number, since 2×1200004431² = 2880021268839267522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1200004431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200004433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200000736 + ... + 200000741.

It is an arithmetic number, because the mean of its divisors is an integer number (400001478).

Almost surely, 2^1200004431 is an apocalyptic number.

1200004431 is a deficient number, since it is larger than the sum of its proper divisors (400001481).

1200004431 is an equidigital number, since it uses as much as digits as its factorization.

1200004431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400001480.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1200004431 is about 34641.0801072946. The cubic root of 1200004431 is about 1062.6598771366.

Adding to 1200004431 its reverse (1344000021), we get a palindrome (2544004452).

The spelling of 1200004431 in words is "one billion, two hundred million, four thousand, four hundred thirty-one".