1421321 has 8 divisors (see below), whose sum is σ = 1562304. Its totient is φ = 1282320.

The previous prime is 1421317. The next prime is 1421339. The reversal of 1421321 is 1231241.

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 1421321 - 2² = 1421317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1421296 and 1421305.

It is not an unprimeable number, because it can be changed into a prime (1421351) 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, 1316 + ... + 2138.

It is an arithmetic number, because the mean of its divisors is an integer number (195288).

2^1421321 is an apocalyptic number.

1421321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1421321 is a deficient number, since it is larger than the sum of its proper divisors (140983).

1421321 is a wasteful number, since it uses less digits than its factorization.

1421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 48, while the sum is 14.

The square root of 1421321 is about 1192.1916792194. The cubic root of 1421321 is about 112.4339299296.

Adding to 1421321 its reverse (1231241), we get a palindrome (2652562).

The spelling of 1421321 in words is "one million, four hundred twenty-one thousand, three hundred twenty-one".