1423152321 has 4 divisors (see below), whose sum is σ = 1897536432. Its totient is φ = 948768212.

The previous prime is 1423152299. The next prime is 1423152389. The reversal of 1423152321 is 1232513241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1232513241 = 3 ⋅410837747.

It is a cyclic number.

It is not a de Polignac number, because 1423152321 - 2⁶ = 1423152257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1423152291 and 1423152300.

It is not an unprimeable number, because it can be changed into a prime (1423152821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 237192051 + ... + 237192056.

It is an arithmetic number, because the mean of its divisors is an integer number (474384108).

Almost surely, 2^1423152321 is an apocalyptic number.

It is an amenable number.

1423152321 is a deficient number, since it is larger than the sum of its proper divisors (474384111).

1423152321 is an equidigital number, since it uses as much as digits as its factorization.

1423152321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474384110.

The product of its digits is 1440, while the sum is 24.

The square root of 1423152321 is about 37724.6911319364. The cubic root of 1423152321 is about 1124.8219823015.

Adding to 1423152321 its reverse (1232513241), we get a palindrome (2655665562).

The spelling of 1423152321 in words is "one billion, four hundred twenty-three million, one hundred fifty-two thousand, three hundred twenty-one".