1129909521 has 8 divisors (see below), whose sum is σ = 1622434240. Its totient is φ = 695328912.

The previous prime is 1129909519. The next prime is 1129909541. The reversal of 1129909521 is 1259099211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1129909521 - 2¹ = 1129909519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 28972039 = 1129909521 / (1 + 1 + 2 + 9 + 9 + 0 + 9 + 5 + 2 + 1).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1129909521.

It is not an unprimeable number, because it can be changed into a prime (1129909541) 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, 14485981 + ... + 14486058.

It is an arithmetic number, because the mean of its divisors is an integer number (202804280).

Almost surely, 2^1129909521 is an apocalyptic number.

It is an amenable number.

1129909521 is a deficient number, since it is larger than the sum of its proper divisors (492524719).

1129909521 is a wasteful number, since it uses less digits than its factorization.

1129909521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28972055.

The product of its (nonzero) digits is 14580, while the sum is 39.

The square root of 1129909521 is about 33614.1268070435. The cubic root of 1129909521 is about 1041.5526368134.

The spelling of 1129909521 in words is "one billion, one hundred twenty-nine million, nine hundred nine thousand, five hundred twenty-one".