12099549 has 16 divisors (see below), whose sum is σ = 20113920. Its totient is φ = 6285360.

The previous prime is 12099511. The next prime is 12099557. The reversal of 12099549 is 94599021.

It is not a de Polignac number, because 12099549 - 2⁷ = 12099421 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12099509) 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, 25959 + ... + 26420.

It is an arithmetic number, because the mean of its divisors is an integer number (1257120).

Almost surely, 2^12099549 is an apocalyptic number.

It is an amenable number.

12099549 is a deficient number, since it is larger than the sum of its proper divisors (8014371).

12099549 is a wasteful number, since it uses less digits than its factorization.

12099549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52400.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 12099549 is about 3478.4405988891. The cubic root of 12099549 is about 229.5741901103.

The spelling of 12099549 in words is "twelve million, ninety-nine thousand, five hundred forty-nine".