1149444021 has 32 divisors (see below), whose sum is σ = 1747464192. Its totient is φ = 665255360.

The previous prime is 1149444011. The next prime is 1149444047. The reversal of 1149444021 is 1204449411.

It is not a de Polignac number, because 1149444021 - 2¹⁰ = 1149442997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1149444021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149444011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 836491 + ... + 837863.

It is an arithmetic number, because the mean of its divisors is an integer number (54608256).

Almost surely, 2^1149444021 is an apocalyptic number.

1149444021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1149444021 is a deficient number, since it is larger than the sum of its proper divisors (598020171).

1149444021 is a wasteful number, since it uses less digits than its factorization.

1149444021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 1149444021 is about 33903.4514614663. The cubic root of 1149444021 is about 1047.5206872916.

The spelling of 1149444021 in words is "one billion, one hundred forty-nine million, four hundred forty-four thousand, twenty-one".