1200424431 has 4 divisors (see below), whose sum is σ = 1600565912. Its totient is φ = 800282952.

The previous prime is 1200424409. The next prime is 1200424457. The reversal of 1200424431 is 1344240021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1344240021 = 3 ⋅448080007.

It is not a de Polignac number, because 1200424431 - 2¹¹ = 1200422383 is a prime.

It is a super-2 number, since 2×1200424431² = 2882037629083347522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200424398 and 1200424407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200428431) 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, 200070736 + ... + 200070741.

It is an arithmetic number, because the mean of its divisors is an integer number (400141478).

Almost surely, 2^1200424431 is an apocalyptic number.

1200424431 is a deficient number, since it is larger than the sum of its proper divisors (400141481).

1200424431 is an equidigital number, since it uses as much as digits as its factorization.

1200424431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400141480.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1200424431 is about 34647.1417435840. The cubic root of 1200424431 is about 1062.7838392034.

Adding to 1200424431 its reverse (1344240021), we get a palindrome (2544664452).

The spelling of 1200424431 in words is "one billion, two hundred million, four hundred twenty-four thousand, four hundred thirty-one".