4421421545 has 8 divisors (see below), whose sum is σ = 5311902024. Its totient is φ = 3533006464.

The previous prime is 4421421463. The next prime is 4421421559. The reversal of 4421421545 is 5451241244.

It can be written as a sum of positive squares in 4 ways, for example, as 754271296 + 3667150249 = 27464^2 + 60557^2 .

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 4421421545 - 2²⁶ = 4354312681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 511634 + ... + 520203.

It is an arithmetic number, because the mean of its divisors is an integer number (663987753).

Almost surely, 2^4421421545 is an apocalyptic number.

It is an amenable number.

4421421545 is a deficient number, since it is larger than the sum of its proper divisors (890480479).

4421421545 is a wasteful number, since it uses less digits than its factorization.

4421421545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032699.

The product of its digits is 25600, while the sum is 32.

The square root of 4421421545 is about 66493.7707232790. The cubic root of 4421421545 is about 1641.2974990058.

Adding to 4421421545 its reverse (5451241244), we get a palindrome (9872662789).

The spelling of 4421421545 in words is "four billion, four hundred twenty-one million, four hundred twenty-one thousand, five hundred forty-five".