4451403105421 has 4 divisors (see below), whose sum is σ = 4451416584732. Its totient is φ = 4451389626112.

The previous prime is 4451403105407. The next prime is 4451403105469. The reversal of 4451403105421 is 1245013041544.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2875700332521 + 1575702772900 = 1695789^2 + 1255270^2 .

It is a cyclic number.

It is not a de Polignac number, because 4451403105421 - 2³¹ = 4449255621773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451403705421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6231526 + ... + 6909031.

It is an arithmetic number, because the mean of its divisors is an integer number (1112854146183).

Almost surely, 2^{4451403105421} is an apocalyptic number.

It is an amenable number.

4451403105421 is a deficient number, since it is larger than the sum of its proper divisors (13479311).

4451403105421 is a wasteful number, since it uses less digits than its factorization.

4451403105421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13479310.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 4451403105421 its reverse (1245013041544), we get a palindrome (5696416146965).

The spelling of 4451403105421 in words is "four trillion, four hundred fifty-one billion, four hundred three million, one hundred five thousand, four hundred twenty-one".