12148809 has 16 divisors (see below), whose sum is σ = 17191680. Its totient is φ = 7609680.

The previous prime is 12148789. The next prime is 12148811. The reversal of 12148809 is 90884121.

It is not a de Polignac number, because 12148809 - 2⁵ = 12148777 is a prime.

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 12148809.

It is not an unprimeable number, because it can be changed into a prime (12148849) 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, 6654 + ... + 8280.

It is an arithmetic number, because the mean of its divisors is an integer number (1074480).

Almost surely, 2^12148809 is an apocalyptic number.

12148809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12148809 is a deficient number, since it is larger than the sum of its proper divisors (5042871).

12148809 is a wasteful number, since it uses less digits than its factorization.

12148809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 12148809 is about 3485.5141658011. The cubic root of 12148809 is about 229.8853177480.

The spelling of 12148809 in words is "twelve million, one hundred forty-eight thousand, eight hundred nine".