1423243221 has 8 divisors (see below), whose sum is σ = 1948945824. Its totient is φ = 923184720.

The previous prime is 1423243189. The next prime is 1423243229. The reversal of 1423243221 is 1223423241.

It is a happy number.

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

It is not a de Polignac number, because 1423243221 - 2⁵ = 1423243189 is a prime.

It is a super-2 number, since 2×1423243221² = 4051242532244909682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1423243191 and 1423243200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1423243229) 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, 6410895 + ... + 6411116.

It is an arithmetic number, because the mean of its divisors is an integer number (243618228).

Almost surely, 2^1423243221 is an apocalyptic number.

It is an amenable number.

1423243221 is a deficient number, since it is larger than the sum of its proper divisors (525702603).

1423243221 is a wasteful number, since it uses less digits than its factorization.

1423243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12822051.

The product of its digits is 2304, while the sum is 24.

The square root of 1423243221 is about 37725.8958939347. The cubic root of 1423243221 is about 1124.8459301108.

Adding to 1423243221 its reverse (1223423241), we get a palindrome (2646666462).

The spelling of 1423243221 in words is "one billion, four hundred twenty-three million, two hundred forty-three thousand, two hundred twenty-one".