1423111421 has 4 divisors (see below), whose sum is σ = 1442606172. Its totient is φ = 1403616672.

The previous prime is 1423111409. The next prime is 1423111439. The reversal of 1423111421 is 1241113241.

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 840420100 + 582691321 = 28990^2 + 24139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1423111421 - 2¹⁸ = 1422849277 is a prime.

It is a super-2 number, since 2×1423111421² = 4050492233161278482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1423111393 and 1423111402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423111121) 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, 9747266 + ... + 9747411.

It is an arithmetic number, because the mean of its divisors is an integer number (360651543).

Almost surely, 2^1423111421 is an apocalyptic number.

It is an amenable number.

1423111421 is a deficient number, since it is larger than the sum of its proper divisors (19494751).

1423111421 is an equidigital number, since it uses as much as digits as its factorization.

1423111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19494750.

The product of its digits is 192, while the sum is 20.

The square root of 1423111421 is about 37724.1490427551. The cubic root of 1423111421 is about 1124.8112067719.

Adding to 1423111421 its reverse (1241113241), we get a palindrome (2664224662).

It can be divided in two parts, 14231 and 11421, that added together give a palindrome (25652).

The spelling of 1423111421 in words is "one billion, four hundred twenty-three million, one hundred eleven thousand, four hundred twenty-one".