4445321421 has 8 divisors (see below), whose sum is σ = 5941242720. Its totient is φ = 2956473872.

The previous prime is 4445321411. The next prime is 4445321459. The reversal of 4445321421 is 1241235444.

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 4445321421 - 2¹⁷ = 4445190349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445321401) 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, 1766970 + ... + 1769483.

It is an arithmetic number, because the mean of its divisors is an integer number (742655340).

Almost surely, 2^4445321421 is an apocalyptic number.

It is an amenable number.

4445321421 is a deficient number, since it is larger than the sum of its proper divisors (1495921299).

4445321421 is a wasteful number, since it uses less digits than its factorization.

4445321421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536875.

The product of its digits is 15360, while the sum is 30.

The square root of 4445321421 is about 66673.2436664064. The cubic root of 4445321421 is about 1644.2495162835.

Adding to 4445321421 its reverse (1241235444), we get a palindrome (5686556865).

The spelling of 4445321421 in words is "four billion, four hundred forty-five million, three hundred twenty-one thousand, four hundred twenty-one".