1044405521 has 4 divisors (see below), whose sum is σ = 1045831092. Its totient is φ = 1042979952.

The previous prime is 1044405463. The next prime is 1044405529. The reversal of 1044405521 is 1255044401.

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 838913296 + 205492225 = 28964^2 + 14335^2 .

It is a cyclic number.

It is not a de Polignac number, because 1044405521 - 2¹⁰ = 1044404497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1044405529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711686 + ... + 713151.

It is an arithmetic number, because the mean of its divisors is an integer number (261457773).

Almost surely, 2^1044405521 is an apocalyptic number.

It is an amenable number.

1044405521 is a deficient number, since it is larger than the sum of its proper divisors (1425571).

1044405521 is an equidigital number, since it uses as much as digits as its factorization.

1044405521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425570.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1044405521 is about 32317.2635134846. The cubic root of 1044405521 is about 1014.5879958874.

Adding to 1044405521 its reverse (1255044401), we get a palindrome (2299449922).

The spelling of 1044405521 in words is "one billion, forty-four million, four hundred five thousand, five hundred twenty-one".