1423210321 has 8 divisors (see below), whose sum is σ = 1533024360. Its totient is φ = 1313444352.

The previous prime is 1423210247. The next prime is 1423210339. The reversal of 1423210321 is 1230123241.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 52359696 + 1370850625 = 7236^2 + 37025^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1423210321 - 2⁷ = 1423210193 is a prime.

It is a super-3 number, since 3×1423210321³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1423210361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70515 + ... + 88423.

It is an arithmetic number, because the mean of its divisors is an integer number (191628045).

Almost surely, 2^1423210321 is an apocalyptic number.

It is an amenable number.

1423210321 is a deficient number, since it is larger than the sum of its proper divisors (109814039).

1423210321 is a wasteful number, since it uses less digits than its factorization.

1423210321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24035.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1423210321 is about 37725.4598514054. The cubic root of 1423210321 is about 1124.8372626496.

Adding to 1423210321 its reverse (1230123241), we get a palindrome (2653333562).

The spelling of 1423210321 in words is "one billion, four hundred twenty-three million, two hundred ten thousand, three hundred twenty-one".