12099541 has 4 divisors (see below), whose sum is σ = 12625632. Its totient is φ = 11573452.

The previous prime is 12099511. The next prime is 12099557. The reversal of 12099541 is 14599021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14599021 = 353 ⋅41357.

It is a cyclic number.

It is not a de Polignac number, because 12099541 - 2⁵ = 12099509 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12099511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 263011 + ... + 263056.

It is an arithmetic number, because the mean of its divisors is an integer number (3156408).

Almost surely, 2^12099541 is an apocalyptic number.

It is an amenable number.

12099541 is a deficient number, since it is larger than the sum of its proper divisors (526091).

12099541 is an equidigital number, since it uses as much as digits as its factorization.

12099541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526090.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 12099541 is about 3478.4394489483. The cubic root of 12099541 is about 229.5741395135.

The spelling of 12099541 in words is "twelve million, ninety-nine thousand, five hundred forty-one".