1123431421 has 8 divisors (see below), whose sum is σ = 1287312320. Its totient is φ = 960398208.

The previous prime is 1123431409. The next prime is 1123431433. The reversal of 1123431421 is 1241343211.

It is an interprime number because it is at equal distance from previous prime (1123431409) and next prime (1123431433).

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

It is not a de Polignac number, because 1123431421 - 2⁷ = 1123431293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1123431392 and 1123431401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123431401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209076 + ... + 214381.

It is an arithmetic number, because the mean of its divisors is an integer number (160914040).

Almost surely, 2^1123431421 is an apocalyptic number.

It is an amenable number.

1123431421 is a deficient number, since it is larger than the sum of its proper divisors (163880899).

1123431421 is an equidigital number, since it uses as much as digits as its factorization.

1123431421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423843.

The product of its digits is 576, while the sum is 22.

The square root of 1123431421 is about 33517.6285109791. The cubic root of 1123431421 is about 1039.5583125037.

Adding to 1123431421 its reverse (1241343211), we get a palindrome (2364774632).

The spelling of 1123431421 in words is "one billion, one hundred twenty-three million, four hundred thirty-one thousand, four hundred twenty-one".