1123401421 has 4 divisors (see below), whose sum is σ = 1123883644. Its totient is φ = 1122919200.

The previous prime is 1123401413. The next prime is 1123401457. The reversal of 1123401421 is 1241043211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 570493225 + 552908196 = 23885^2 + 23514^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123401421 - 2³ = 1123401413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123401491) 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 3 ways as a sum of consecutive naturals, for example, 237600 + ... + 242281.

It is an arithmetic number, because the mean of its divisors is an integer number (280970911).

Almost surely, 2^1123401421 is an apocalyptic number.

It is an amenable number.

1123401421 is a deficient number, since it is larger than the sum of its proper divisors (482223).

1123401421 is an equidigital number, since it uses as much as digits as its factorization.

1123401421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482222.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1123401421 is about 33517.1809822962. The cubic root of 1123401421 is about 1039.5490590011.

Adding to 1123401421 its reverse (1241043211), we get a palindrome (2364444632).

The spelling of 1123401421 in words is "one billion, one hundred twenty-three million, four hundred one thousand, four hundred twenty-one".