1451421321 has 16 divisors (see below), whose sum is σ = 2224051200. Its totient is φ = 824748048.

The previous prime is 1451421317. The next prime is 1451421329. The reversal of 1451421321 is 1231241541.

It is not a de Polignac number, because 1451421321 - 2² = 1451421317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1451421291 and 1451421300.

It is not an unprimeable number, because it can be changed into a prime (1451421329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189301 + ... + 196818.

It is an arithmetic number, because the mean of its divisors is an integer number (139003200).

Almost surely, 2^1451421321 is an apocalyptic number.

It is an amenable number.

1451421321 is a deficient number, since it is larger than the sum of its proper divisors (772629879).

1451421321 is a wasteful number, since it uses less digits than its factorization.

1451421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386308.

The product of its digits is 960, while the sum is 24.

The square root of 1451421321 is about 38097.5238171722. The cubic root of 1451421321 is about 1132.2208967732.

Adding to 1451421321 its reverse (1231241541), we get a palindrome (2682662862).

The spelling of 1451421321 in words is "one billion, four hundred fifty-one million, four hundred twenty-one thousand, three hundred twenty-one".