1089428521 has 16 divisors (see below), whose sum is σ = 1134638208. Its totient is φ = 1045296000.

The previous prime is 1089428519. The next prime is 1089428533. The reversal of 1089428521 is 1258249801.

It is a cyclic number.

It is not a de Polignac number, because 1089428521 - 2¹ = 1089428519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1089428551) 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, 594076 + ... + 595906.

It is an arithmetic number, because the mean of its divisors is an integer number (70914888).

Almost surely, 2^1089428521 is an apocalyptic number.

It is an amenable number.

1089428521 is a deficient number, since it is larger than the sum of its proper divisors (45209687).

1089428521 is a wasteful number, since it uses less digits than its factorization.

1089428521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 1089428521 is about 33006.4921038271. The cubic root of 1089428521 is about 1028.9625778491.

The spelling of 1089428521 in words is "one billion, eighty-nine million, four hundred twenty-eight thousand, five hundred twenty-one".