1421403321 has 8 divisors (see below), whose sum is σ = 2040989440. Its totient is φ = 874709712.

The previous prime is 1421403311. The next prime is 1421403329. The reversal of 1421403321 is 1233041241.

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

It is not a de Polignac number, because 1421403321 - 2⁶ = 1421403257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1421403329) 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, 18223081 + ... + 18223158.

It is an arithmetic number, because the mean of its divisors is an integer number (255123680).

Almost surely, 2^1421403321 is an apocalyptic number.

It is an amenable number.

1421403321 is a deficient number, since it is larger than the sum of its proper divisors (619586119).

1421403321 is a wasteful number, since it uses less digits than its factorization.

1421403321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36446255.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1421403321 is about 37701.5029010781. The cubic root of 1421403321 is about 1124.3610056169.

Adding to 1421403321 its reverse (1233041241), we get a palindrome (2654444562).

The spelling of 1421403321 in words is "one billion, four hundred twenty-one million, four hundred three thousand, three hundred twenty-one".