1421543321 has 8 divisors (see below), whose sum is σ = 1586839584. Its totient is φ = 1262257920.

The previous prime is 1421543309. The next prime is 1421543351. The reversal of 1421543321 is 1233451241.

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 1421543321 - 2³⁰ = 347801497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1421543351) 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, 1502216 + ... + 1503161.

It is an arithmetic number, because the mean of its divisors is an integer number (198354948).

Almost surely, 2^1421543321 is an apocalyptic number.

1421543321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421543321 is a deficient number, since it is larger than the sum of its proper divisors (165296263).

1421543321 is a wasteful number, since it uses less digits than its factorization.

1421543321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005431.

The product of its digits is 2880, while the sum is 26.

The square root of 1421543321 is about 37703.3595452713. The cubic root of 1421543321 is about 1124.3979187554.

Adding to 1421543321 its reverse (1233451241), we get a palindrome (2654994562).

The spelling of 1421543321 in words is "one billion, four hundred twenty-one million, five hundred forty-three thousand, three hundred twenty-one".